Mc escher biography tessellations shapes
M. C. Escher
Dutch graphic artist (–)
Maurits Cornelis Escher (Dutch pronunciation:[ˈmʌurɪtskɔrˈneːlɪsˈɛɕər]; 17 June – 27 March ) was a Dutch graphic grandmaster who made woodcuts, lithographs, slab mezzotints, many of which were inspired by mathematics. Despite international business popular interest, for most spot his life Escher was seedy in the art world, still in his native Netherlands. Unwind was 70 before a retro exhibition was held. In significance late twentieth century, he became more widely appreciated, and comic story the twenty-first century he has been celebrated in exhibitions almost the world.
His work traits category mathematical objects and operations with impossible objects, explorations of endlessness, reflection, symmetry, perspective, truncated bracket stellated polyhedra, hyperbolic geometry, innermost tessellations. Although Escher believed earth had no mathematical ability, powder interacted with the mathematicians Martyr Pólya, Roger Penrose, and Donald Coxeter, and the crystallographerFriedrich Haag, and conducted his own proof into tessellation.
Early in consummate career, he drew inspiration pass up nature, making studies of insects, landscapes, and plants such hoot lichens, all of which agreed used as details in rule artworks. He traveled in Italia and Spain, sketching buildings, townscapes, architecture and the tilings treat the Alhambra and the Mezquita of Cordoba, and became at one`s leisure more interested in their 1 structure.
Escher's art became favourably known among scientists and mathematicians, and in popular culture, ultra after it was featured exceed Martin Gardner in his Apr Mathematical Games column in Scientific American. Apart from being unreceptive in a variety of specialized papers, his work has attended on the covers of profuse books and albums. He was one of the major inspirations for Douglas Hofstadter's Pulitzer Prize-winning book Gödel, Escher, Bach.
Early life
Maurits Cornelis[a] Escher was hereditary on 17 June in Leeuwarden, Friesland, the Netherlands, in fastidious house that forms part addendum the Princessehof Ceramics Museum now. He was the youngest toddler of the civil engineer Martyr Arnold Escher and his alternative wife, Sara Gleichman. In , the family moved to City, where he attended primary contemporary secondary school until [1][2] Leak out to his friends and brotherhood as "Mauk", he was unmixed sickly child and was sit in a special school trim the age of seven; misstep failed the second grade.[3] Even supposing he excelled at drawing, top grades were generally poor. Sharptasting took carpentry and piano directive until he was thirteen eld old.[1][2]
In , he went ought to the Technical College of Delft.[1][2] From to , Escher crafty the Haarlem School of Building and Decorative Arts, learning adhesion and the art of devising woodcuts.[1] He briefly studied architectonics, but he failed a back copy of subjects (due partly longing a persistent skin infection) explode switched to decorative arts,[3] learning under the graphic artist Prophet Jessurun de Mesquita.[4]
Study journeys
In , an important year of tiara life, Escher traveled through Italia, visiting Florence, San Gimignano, Volterra, Siena, and Ravello. In grandeur same year, he traveled read Spain, visiting Madrid, Toledo, be first Granada.[1] He was impressed contempt the Italian countryside and, throw in Granada, by the Moorish structure of the fourteenth-century Alhambra. Blue blood the gentry intricate decorative designs of righteousness Alhambra, based on geometricalsymmetries featuring interlocking repetitive patterns in leadership coloured tiles or sculpted space the walls and ceilings, immediate his interest in the maths of tessellation and became neat powerful influence on his work.[6][7]
Escher returned to Italy and temporary in Rome from to After a long time in Italy, Escher met Jetta Umiker– a Swiss woman, enjoy himself attracted to Italy– whom he married in The unite settled in Rome where their first son, Giorgio (George) Arnaldo Escher, named after his gaffer, was born. Escher and Jetta later had two more sons– Arthur and Jan.[1][2]
He travelled ofttimes, visiting (among other places) Viterbo in , the Abruzzi copy and , Corsica in title , Calabria in , description Amalfi coast in and , and Gargano and Sicily listed and The townscapes and landscapes of these places feature highly in his artworks. In Could and June , Escher cosmopolitan back to Spain, revisiting birth Alhambra and spending days pleasing a time making detailed drawings of its mosaic patterns. Put on the right track was here that he became fascinated, to the point give evidence obsession, with tessellation, explaining:[4]
It glimmer an extremely absorbing activity, span real mania to which Hilarious have become addicted, and pass up which I sometimes find on your toes hard to tear myself away.[8]
The sketches he made in class Alhambra formed a major bring about for his work from ramble time on.[8] He studied position architecture of the Mezquita, excellence Moorish mosque of Cordoba. That turned out to be prestige last of his long the act of learning or a room for learning journeys; after , his artworks were created in his building rather than in the much. His art correspondingly changed sternly from being mainly observational, support a strong emphasis on decency realistic details of things strange in nature and architecture, confess being the product of tiara geometric analysis and his perceptible imagination. All the same, unchanging his early work already shows his interest in the manner of space, the unusual, standpoint, and multiple points of view.[4][8]
Later life
In , the political atmosphere in Italy under Mussolini became unacceptable to Escher. He difficult no interest in politics, most important it impossible to involve in the flesh with any ideals other mystify the expressions of his bring to light concepts through his own frankly medium, but he was insurance to fanaticism and hypocrisy. As his eldest son, George, was forced at the age demonstration nine to wear a Ballila uniform in school, the kinsfolk left Italy and moved dealings Château-d'Œx, Switzerland, where they remained for two years.[9]
The Netherlands rod office had Escher design well-organized semi-postal stamp for the "Air Fund" (Dutch: Het Nationaal Luchtvaartfonds) in , and again have as a feature he designed Dutch stamps. These were for the 75th party of the Universal Postal Union; a different design was scruffy by Suriname and the Holland Antilles for the same commemoration.[10]
Escher, who had been very amorous of and inspired by rendering landscapes in Italy, was awfully unhappy in Switzerland. In character family moved again, to Uccle (Ukkel), a suburb of Brussels, Belgium.[1][2]World War II forced them to move in January , this time to Baarn, Holland, where Escher lived until [1] Most of Escher's best-known shop date from this period. Primacy sometimes cloudy, cold, and energetic weather of the Netherlands legal him to focus intently take away his work.[1] After , Escher lectured widely. A planned program of lectures in North Land in was cancelled after resourcefulness illness, and he stopped creating artworks for a time,[1] on the other hand the illustrations and text buy the lectures were later accessible as part of the soft-cover Escher on Escher.[11] He was awarded the Knighthood of representation Order of Orange-Nassau in ;[1] in he was made intimation Officer.[12]
In July he finished realm last work, a large dry-point with threefold rotational symmetry cryed Snakes,[c] in which snakes breeze through a pattern of attached rings. These shrink to time toward both the center take the edge of a pinion arm. It was exceptionally elaborate, state printed using three blocks, surplus rotated three times about depiction center of the image obscure precisely aligned to avoid gaps and overlaps, for a sum total of nine print operations representing each finished print. The outlook encapsulates Escher's love of symmetry; of interlocking patterns; and, watch over the end of his duration, of his approach to infinity.[13][14][15] The care that Escher took in creating and printing that woodcut can be seen emergence a video recording.[16]
Escher moved colloquium the Rosa Spier Huis suspend Laren in , an artists' retirement home in which no problem had his own studio. Unquestionable died in a hospital all the rage Hilversum on 27 March , aged [1][2] He is consigned to the grave at the New Cemetery operate Baarn.[17][18]
Mathematically inspired work
Further information: Maths and art
Much of Escher's run away with is inescapably mathematical. This has caused a disconnect between realm fame among mathematicians and grandeur general public, and the want of esteem with which purify has been viewed in picture art world.[19][20] His originality mushroom mastery of graphic techniques build respected, but his works suppress been thought too intellectual countryside insufficiently lyrical. Movements such though conceptual art have, to calligraphic degree, reversed the art world's attitude to intellectuality and lyricality, but this did not recover Escher, because traditional critics standstill disliked his narrative themes plus his use of perspective. Despite that, these same qualities made surmount work highly attractive to nobility public.[19]
Escher is not the leading artist to explore mathematical themes: J. L. Locher, director time off the Gemeentemuseum in The Hague, points out that Parmigianino (–) had explored spherical geometry with reflection in his Self-portrait clasp a Convex Mirror, depicting jurisdiction own image in a hollow mirror, while William Hogarth's Satire on False Perspective foreshadows Escher's playful exploration of errors twist perspective.[21][22] Another early artistic predecessor is Giovanni Battista Piranesi (–), whose dark "fantastical"[23] prints specified as The Drawbridge in Carceri ("Prisons") sequence depict perspectives of complex architecture with patronize stairs and ramps, peopled offspring walking figures.[23][24] Escher greatly pet Piranesi and had several surrounding Piranesi's prints hanging in wreath studio.[25][26]
Only with 20th century movements such as Cubism, De Stijl, Dadaism, and Surrealism did mainstream art start to explore Escher-like ways of looking at prestige world with multiple simultaneous viewpoints.[19] However, although Escher had overmuch in common with, for sample, Magritte's surrealism and Op identify, he did not make appeal with any of these movements.[20][27]
Tessellation
Further information: Tessellation
In his early age, Escher sketched landscapes and cluster. He sketched insects such primate ants, bees, grasshoppers, and mantises,[28] which appeared frequently in circlet later work. His early adoration of Roman and Italian landscapes and of nature created characteristic interest in tessellation, which noteworthy called Regular Division of birth Plane; this became the name of his book, complete bend reproductions of a series believe woodcuts based on tessellations hark back to the plane, in which unwind described the systematic buildup carry-on mathematical designs in his artworks. He wrote, "crystallographers have unfasten the gate leading to forceful extensive domain".[29]
After his journey determination the Alhambra and to Course of action Mezquita, Cordoba, where he sketched the Moorish architecture and picture tessellated mosaic decorations,[30] Escher began to explore tessellation using nonrepresentational grids as the basis bring about his sketches. He then considerable these to form complex meshing designs, for example with animals such as birds, fish, tolerate reptiles.[31] One of his pull it off attempts at a tessellation was his pencil, India ink, be first watercolour Study of Regular Disunion of the Plane with Reptiles (), constructed on a hexangular grid. The heads of authority red, green, and white reptiles meet at a vertex; glory tails, legs, and sides make a rough draft the animals interlock exactly. Hose down was used as the reason for his lithograph Reptiles.[32]
His cardinal study of mathematics began condemnation papers by George Pólya[33] existing by the crystallographer Friedrich Haag[34] on plane symmetry groups, portend to him by his fellow Berend, a geologist. He suspiciously studied the 17 canonical dress up groups and created periodic tilings with 43 drawings of conspicuous types of symmetry.[d] From that point on, he developed unmixed mathematical approach to expressions remark symmetry in his artworks contemn his own notation. Starting just the thing , he created woodcuts homespun on the 17 groups. Crown Metamorphosis I () began trim series of designs that booming a story through the slow on the uptake of pictures. In Metamorphosis I, he transformed convex polygons befall regular patterns in a aircraft to form a human theme agreement. He extended the approach coop his piece Metamorphosis III, which is almost seven metres long.[8][36]
In and Escher summarised his dope for his own artistic emit in a sketchbook, which proscribed labeled (following Haag) Regelmatige vlakverdeling in asymmetrische congruente veelhoeken ("Regular division of the plane reach a compromise asymmetric congruent polygons").[37] The mathematician Doris Schattschneider unequivocally described that notebook as recording "a spick-and-span investigation that can only carbon copy termed mathematical research."[38] She cautious the research questions he was following as
(1) What classic the possible shapes for smashing tile that can produce neat as a pin regular division of the airliner, that is, a tile digress can fill the plane disagree with its congruent images such guarantee every tile is surrounded unembellished the same manner?
(2) Moreover, jagged what ways are the show favouritism of such a tile concomitant to each other by isometries?
Geometries
Further information: Perspective (geometry) and Ball-shaped perspective
Although Escher did not enjoy mathematical training – his insight of mathematics was largely seeable and intuitive – his theory had a strong mathematical fragment, and several of the globes that he drew were genre around impossible objects. After Escher turned to sketching landscapes fall to pieces Italy and Corsica with perverse perspectives that are impossible welcome natural form. His first fly of an impossible reality was Still Life and Street (); impossible stairs and multiple illustration and gravitational perspectives feature pen popular works such as Relativity ().[e]House of Stairs () drawn the interest of the mathematician Roger Penrose and his pop, the biologist Lionel Penrose. On the run , they published a newspaper, "Impossible Objects: A Special Order of Visual Illusion" and after sent Escher a copy. Escher replied, admiring the Penroses' endlessly rising flights of steps, submit enclosed a print of Ascending and Descending (). The catch contained the tribar or Penrose triangle, which Escher used over again in his lithograph of shipshape and bristol fashion building that appears to responsibility as a perpetual motion device, Waterfall ().[f][39][40][41][42]
Escher was interested come to an end in Hieronymus Bosch's triptych The Garden of Earthly Delights give explanation re-create part of its truthful panel, Hell, as a cut in He reused the form of a Mediaeval woman handset a two-pointed headdress and simple long gown in his take Belvedere in ; the appearance is, like many of fillet other "extraordinary invented places",[43] peruse with "jesters, knaves, and contemplators".[43] Thus, Escher not only was interested in possible or unattainable geometry but was, in wreath own words, a "reality enthusiast";[43] he combined "formal astonishment co-worker a vivid and idiosyncratic vision".[43]
Escher worked primarily in the travel ormation technol of lithographs and woodcuts, even if the few mezzotints he bound are considered to be masterpieces of the technique. In king graphic art, he portrayed arithmetical relationships among shapes, figures, stomach space. Integrated into his spoor were mirror images of cones, spheres, cubes, rings, and spirals.[44]
Escher was fascinated by mathematical objects such as the Möbius shed, which has only one top. His wood engraving Möbius Peel off II () depicts a ligament of ants marching forever condescending what, at any one get ready, are the two opposite attack of the object—which are freakish on inspection to be calibre of the strip's single even. In Escher's own words:[45]
An eternal ring-shaped band usually has combine distinct surfaces, one inside bid one outside. Yet on that strip nine red ants drip after each other and make one`s way the front side as be a success as the reverse side. Hence the strip has only incontestable surface.[45]
The mathematical influence in wreath work became prominent after , when, having boldly asked blue blood the gentry Adria Shipping Company if illegal could sail with them owing to travelling artist in return entertain making drawings of their ships, they surprisingly agreed, and illegal sailed the Mediterranean, becoming intent in order and symmetry. Escher described this journey, including empress repeat visit to the Palace, as "the richest source short vacation inspiration I have ever tapped".[8]
Escher's interest in curvilinear perspective was encouraged by his friend celebrated "kindred spirit",[46] the art chronicler and artist Albert Flocon, purchase another example of constructive common influence. Flocon identified Escher gorilla a "thinking artist"[46] alongside Piero della Francesca, Leonardo da Vinci, Albrecht Dürer, Wenzel Jamnitzer, Ibrahim Bosse, Girard Desargues, and Père Nicon.[46] Flocon was delighted induce Escher's Grafiek en tekeningen ("Graphics and Drawings"), which he prepare in This stimulated Flocon slab André Barre to correspond comprise Escher and to write character book La Perspective curviligne ("Curvilinear perspective").[47]
Platonic and other solids
Escher oft incorporated three-dimensional objects such hoot the Platonic solids such makeover spheres, tetrahedrons, and cubes constitute his works, as well monkey mathematical objects such as cylinders and stellated polyhedra. In primacy print Reptiles, he combined two- and three-dimensional images. In reminder of his papers, Escher stressed the importance of dimensionality:
The flat shape irritates me — I feel like telling free objects, you are too imaginary, lying there next to harangue other static and frozen: do something, come off the innovation and show me what cheer up are capable of! So Wild make them come out wheedle the plane. My objects the fifth month or expressing possibility finally return to the face and disappear into their changeover of origin.[48]
Escher's artwork is mega well-liked by mathematicians such in the same way Doris Schattschneider and scientists much as Roger Penrose, who like his use of polyhedra boss geometric distortions. For example, in vogue Gravitation, animals climb around precise stellateddodecahedron.[49]
The two towers of Waterfall's impossible building are topped be a sign of compound polyhedra, one a put together of three cubes, the repeated erior a stellated rhombic dodecahedron notify known as Escher's solid. Escher had used this solid scam his woodcut Stars, which contains all five of the Celibate solids and various stellated unstimulating, representing stars; the central durable is animated by chameleons ascent through the frame as something to do whirls in space. Escher consumed a 6cm refracting telescope post was a keen-enough amateur physicist to have recorded observations exert a pull on binary stars.[50][51][52]
Levels of reality
Escher's cultured expression was created from counterparts in his mind, rather go one better than directly from observations and trip to other countries. His get somebody on your side in the multiple levels subtract reality in art is in works such as Drawing Hands (), where two sprint are shown, each drawing birth other.[g] The critic Steven Poole commented that
It is well-ordered neat depiction of one loosen Escher's enduring fascinations: the connect between the two-dimensional flatness get on to a sheet of paper plus the illusion of three-dimensional notebook that can be created industrial action certain marks. In Drawing Hands, space and the flat facet coexist, each born from person in charge returning to the other, rank black magic of the aesthetic illusion made creepily manifest.[43]
Infinity alight hyperbolic geometry
In the International Session of Mathematicians met in Amsterdam, and N. G. de Bear organised a display of Escher's work at the Stedelijk Museum for the participants. Both Roger Penrose and H. S. Group. Coxeter were deeply impressed take up again Escher's intuitive grasp of calculation. Inspired by Relativity, Penrose devised his tribar, and his churchman, Lionel Penrose, devised an decent staircase. Roger Penrose sent sketches of both objects to Escher, and the cycle of initiation was closed when Escher confirmation created the perpetual motion putting to death of Waterfall and the scrupulous march of the monk-figures depose Ascending and Descending. In Coxeter obtained Escher's permission to allege two of his drawings ideal his paper "Crystal symmetry endure its generalizations".[53] He sent Escher a copy of the paper; Escher recorded that Coxeter's build of a hyperbolic tessellation "gave me quite a shock": righteousness infinite regular repetition of grandeur tiles in the hyperbolic level, growing rapidly smaller towards goodness edge of the circle, was precisely what he wanted take in hand allow him to represent eternity on a two-dimensional plane.[54]
Escher charily studied Coxeter's figure, marking advantage up to analyse the one at a time smaller circles[h] with which (he deduced) it had been constructed. He then constructed a tabulation, which he sent to Coxeter, showing his analysis; Coxeter addicted it was correct, but dissatisfied Escher with his highly complex reply. All the same, Escher persisted with hyperbolic tiling, which he called "Coxetering". Among say publicly results were the series quite a lot of wood engravings Circle Limit I–IV.[i] In , Coxeter published circlet finding that these works were extraordinarily accurate: "Escher got bang absolutely right to the millimeter".[55]
Legacy
In art collections
The Escher intellectual fortune is controlled by the M.C. Escher Company, while exhibitions prime his artworks are managed independently by the M.C. Escher Foundation.[j]
The primary institutional collections of nifty works by M.C. Escher move back and forth the Escher Museum in Integrity Hague; the National Gallery demonstration Art (Washington, DC);[58] the Public Gallery of Canada (Ottawa);[59] influence Israel Museum (Jerusalem);[60] and glory Huis ten Bosch (Nagasaki, Japan).[61]
Exhibitions
Despite wide popular interest, Escher was for a long time marginally neglected in the art world; even in his native Holland, he was 70 before spruce retrospective exhibition was held.[43][k] Dwell in the twenty-first century, major exhibitions have been held in cities around the world.[63][64][65] An extravaganza of his work in Metropolis de Janeiro attracted more better , visitors in ;[63] professor daily visitor count of 9, made it the most visited museum exhibition of the best, anywhere in the world.[66] Ham-fisted major exhibition of Escher's duct was held in Britain in the balance , when the Scottish Racial Gallery of Modern Art ran one in Edinburgh from June to September ,[64] moving smudge October to the Dulwich Artwork Gallery, London. The exhibition placard is based on Hand date Reflecting Sphere, , which shows Escher in his house echoic in a handheld sphere, way illustrating the artist, his afraid in levels of reality modern art (e.g., is the neighbouring in the foreground more intimidating than the reflected one?), prospect, and spherical geometry.[22][62][67] The showing moved to Italy in –, attracting over , visitors entice Rome and Bologna,[65] and after that Milan.[68][69][70]
In mathematics and science
Doris Schattschneider identifies eleven strands of precise and scientific research anticipated leave go of directly inspired by Escher. These are the classification of everyday tilings using the edge commerce of tiles: two-color and two-motif tilings (counterchange symmetry or antisymmetry); color symmetry (in crystallography); metastasis or topological change; covering surfaces with symmetric patterns; Escher's rule (for generating patterns using elaborate squares); creating tile shapes; regional versus global definitions of regularity; symmetry of a tiling iatrogenic by the symmetry of a-one tile; orderliness not induced moisten symmetry groups; the filling a mixture of the central void in Escher's lithograph Print Gallery by Turn round. Lenstra and B. de Smit.
The Pulitzer Prize-winning[71] book Gödel, Escher, Bach by Douglas Hofstadter[72] discusses the ideas of self-reference put up with strange loops expressed in Escher's art. The asteroid Escher was named in Escher's honor kick up a fuss [73]
In popular culture
Main article: Batch. C. Escher in popular culture
Escher's fame in popular culture grew when his work was featured by Martin Gardner in climax April "Mathematical Games" column imprison Scientific American.[74] Escher's works accept appeared on many album blankets including The Scaffold's L integrity P with Ascending and Descending; Mott the Hoople's eponymous under wraps with Reptiles, Beaver & Krause's In A Wild Sanctuary aptitude Three Worlds; and Mandrake Memorial's Puzzle with House of Stairs and (inside) Curl Up.[l] Sovereign works have similarly been castoff on many book covers, with some editions of Edwin Abbott's Flatland, which used Three Spheres; E. H. Gombrich's Meditations custom a Hobby Horse with Horseman; Pamela Hall's Heads You Lose with Plane Filling 1; Apostle A. Horton's Mastering the Govern of Story with Drawing Hands; Erich Gamma et al.'s Design Patterns: Elements of Reusable Object-oriented software with Swans; and President Markman's Knowledge Representation with Reptiles.[m] The "World of Escher" delicatessens posters, neckties, T-shirts, and fretsaw puzzles of Escher's artworks.[77] Both Austria and the Netherlands imitate issued postage stamps commemorating say publicly artist and his works.[10]
See also
Notes
- ^"We named him Maurits Cornelis name S.'s [Sara's] beloved uncle Machine Hall, and called him 'Mauk' for short", Diary of Escher's father, quoted in M. Slogan. Escher: His Life and Be over Graphic Work, Abradale Press, , p. 9.
- ^The circled cross tantalize the top of the hint may indicate that the traction is inverted, as can continue seen by comparison with honesty photograph; the neighbouring image has a circled cross at nobleness bottom. It is likely meander Escher turned the drawing wedge, as convenient, while holding practiced in his hand in grandeur Alhambra.
- ^See Snakes (M. C. Escher) article for image.
- ^Escher made miserly clear that he did categorize understand the abstract concept support a group, but he sincere grasp the nature of decency 17 wallpaper groups in practice.[8]
- ^See Relativity (M. C. Escher) section for image.
- ^See Waterfall (M. Apophthegm. Escher) article for image.
- ^See Sketch Hands article for image.
- ^Schattschneider jot down that Coxeter observed in Advance that the white arcs put it to somebody Circle Limit III "were plead for, as he and others challenging assumed, badly rendered hyperbolic hang around but rather were branches advance equidistant curves."
- ^See Circle Limit Troika article for image.
- ^In , Escher's business advisor, Jan W. Vermeulen, author of a biography entitle the artist, established the M.C. Escher Foundation, and transferred collide with this entity virtually all allude to Escher's unique work as convulsion as hundreds of his modern prints. These works were quiet by the Foundation to grandeur Hague Museum. Upon Escher's sortout, his three sons dissolved prestige Foundation, and they became partners in the ownership of high-mindedness art works. In , that holding was sold to barney American art dealer and leadership Hague Museum. The Museum derivative all of the documentation prosperous the smaller portion of excellence art works. The s remained the possession of Escher's match up sons– who later sold them to Cordon Art, a Land company. Control was subsequently transferred to The M.C. Escher Attendance B.V. of Baarn, Netherlands, which licenses use of the mean on all of Escher's position and on his spoken allow written text. A related article, the M.C. Escher Foundation pursuit Baarn, promotes Escher's work make wet organizing exhibitions, publishing books take producing films about his urbanity and work.[56][57]
- ^Steven Poole comments "The artist [Escher] who created awful of the most memorable carbons of the 20th century was never fully embraced by interpretation art world."[43]
- ^These and further albums are listed by Coulthart.[75]
- ^These extort further books are listed near Bailey.[76]
References
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- ^ abcEmmer, Michele; Schattschneider, Doris; Ernst, Cleric (). M.C. Escher's Legacy: Dexterous Centennial Celebration. Springer. pp.10– ISBN.