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A Pythagorean tiling or two squares tessellation is a tiling of a Euclidean plane by squares of two different sizes, in which each square touches four squares of the other size on its four sides. Many proofs of the Pythagorean theorem are based on it, [2] explaining its name. [1] It is commonly used as a pattern for floor tiles.
Xuan tu or Hsuan thu (simplified Chinese: 弦图; traditional Chinese: 絃圖; pinyin: xuántú; Wade–Giles: hsüan 2 tʻu 2) is a diagram given in the ancient Chinese astronomical and mathematical text Zhoubi Suanjing indicating a proof of the Pythagorean theorem. [1]
In the last part of the text, the solution is proved correct using the Pythagorean theorem. The steps of the solution are believed to represent cut-and-paste geometry operations involving a diagram from which, it has been suggested, ancient Mesopotamians might, at an earlier time, have derived the Pythagorean theorem.
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The Bride's chair proof of the Pythagorean theorem, that is, the proof of the Pythagorean theorem based on the Bride's Chair diagram, is given below. The proof has been severely criticized by the German philosopher Arthur Schopenhauer as being unnecessarily complicated, with construction lines drawn here and there and a long line of deductive ...
Area theorem (conformal mapping) (complex analysis) Arithmetic Riemann–Roch theorem (algebraic geometry) Aronszajn–Smith theorem (functional analysis) Arrival theorem (queueing theory) Arrow's impossibility theorem (game theory) Arrow-Lind theorem (welfare economics) Art gallery theorem ; Artin approximation theorem (commutative algebra)
At Dulcarnon (literally two-horned) is a reference to the supposed difficulty of the theorem by the 14-century English poet Geoffrey Chaucer in Troilus and Criseyde. The premise that Pythagoras had left some writings, the manuscripts which have been lost, forms the premise of Pythagoras' Revenge: A Mathematical Mystery by Arturo Sangalli ; it ...
A wallpaper group (or plane symmetry group or plane crystallographic group) is a mathematical classification of a two-dimensional repetitive pattern, based on the symmetries in the pattern. Such patterns occur frequently in architecture and decorative art, especially in textiles, tiles, and wallpaper.