Penrose stairs — noun A drawing by and that features a set of stairs that are impossible to be fully constructed as a three dimensional object … Wiktionary
Penrose — may refer to these places:* Penrose, Arlington, Virginia, a neighborhood in the United States * Penrose, Colorado, a town in the United States * Penrose, Padstow, a small village in north Cornwall, England, with a World War II base near it *… … Wikipedia
Roger Penrose — Infobox Scientist box width = 300px name = Sir Roger Penrose image size = 200px caption = Roger Penrose at Brookhaven Lab, February 6, 2007 birth date = birth date and age|1931|08|08 birth place = Colchester, Essex, England death date = death… … Wikipedia
House of Stairs — Artwork title=House of Stairs artist=M. C. Escher year=1951 type=lithograph height=47.2 width=23.8: For other works entitled House of Stairs, see House of Stairs (disambiguation). House of Stairs is a lithograph print by the Dutch artist M. C.… … Wikipedia
Stairway — Stairs redirects here. For other uses, see Stairs (disambiguation). Staircase redirects here. For other uses, see Staircase (disambiguation). This article is about the construction. For the song by Led Zeppelin, see Stairway to Heaven. Stairways… … Wikipedia
Impossible object — An impossible object (also known as an impossible figure or an undecidable figure) is a type of optical illusion consisting of a two dimensional figure which is instantly and subconsciously interpreted by the visual system as representing a… … Wikipedia
Ascending and Descending — Artwork title=Ascending and Descending artist=M. C. Escher year=1960 type=lithograph height=35.5 width=28.5 Ascending and Descending is a lithograph print by the Dutch artist M. C. Escher which was first printed in March 1960.The original print… … Wikipedia
List of mathematics articles (P) — NOTOC P P = NP problem P adic analysis P adic number P adic order P compact group P group P² irreducible P Laplacian P matrix P rep P value P vector P y method Pacific Journal of Mathematics Package merge algorithm Packed storage matrix Packing… … Wikipedia
List of eponyms (L-Z) — An eponym is a person (real or fictitious) whose name has become identified with a particular object or activity. NOTOC Here is a list of eponyms:A–K L M N–O P Q–R S T U–V W X–ZL* Rudolf Laban choreographer, created labanotation. * Ferruccio… … Wikipedia
Inception — For other uses, see Inception (disambiguation). Inception … Wikipedia
