Citations:Penrose stairs

English citations of Penrose stairs

generic

• 1999 March 15, John Clute with John Grant, The Encyclopedia of Fantasy, Macmillan, →ISBN, →OL, keyword "Escher, M(aurits) C(ornelis)", page 322:

  […] and the more subtly disconcerting Penrose stairs in "Ascending and Descending" (1960), where cowled figures plod around a quadrilateral loop of staircase going forever up, or down.

• 2011 June 27, Waka Nakanishi, Taisuke Matsuno, Junji Ichikawa, Hiroyuki Isobe, “llusory Molecular Expression of “Penrose Stairs” by an Aromatic Hydrocarbon”, in Angewandte Chemie International Edition, volume 50, number 27, →DOI, pages 6048–6051:

  A combination of two helical molecules and two twisting covalent axes in the form of a macrocycle conjures an illusory molecular object that has a seemingly impossible molecular structure, that is, an endlessly descending circle that consists of an sp²-carbon network, which can be regarded as the molecular expression of Penrose stairs.

• 2012 April 16, Rob Coley with Dean Lockwood, Cloud Time, Alresford: Zero Books, →ISBN, →OL, page 5:

  Inception contains a set of Penrose stairs which handily illustrate the disjunctive Baroque-Cartesian synthesis described here.

possibly a reference to Penrose's specific stairs, but probably generic

• 1985, Jack Weber, Computers‎^[1], New York: Arco, →ISBN, →OL, page 62:

  All three — the Penrose triangle, the devil's pitchfork and the Penrose stairs — can be instantly recognized as impossible objects: our brains do it very easily, but how could we set about programming a computer to see that they are visual frauds?

• 2012, Christopher Davis, Pieces of Thought →ISBN, page 34:

  The world just escalated, climbing up the Penrose stairs motorized and unmotivated we've populated this big blue sphere with war […]