Impossible trident: Difference between revisions
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The graphic artist [[M. C. Escher]] used these types of figures as the basis for impossible three-dimensional compositions in many of his woodcut prints.{{cn|date=March 2016}} |
The graphic artist [[M. C. Escher]] used these types of figures as the basis for impossible three-dimensional compositions in many of his woodcut prints.{{cn|date=March 2016}} |
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The word "poiuyt" appeared on the March 1965 cover<ref>{{cite web |url=http://madcoversite.com/mad093.html |title=Doug Gilford's Mad Cover Site - Mad #93 |publisher=Madcoversite.com |date= |accessdate=2010-10-22}}</ref> of ''[[Mad (magazine)|Mad]]'' magazine bearing the caption "Introducing 'The Mad Poiuyt' " (the last six letters on the top row of many Latin-script [[typewriter]] keyboards, right to left), and has appeared numerous times since then. An anonymously-contributed version described as a "hole location gauge" was printed in the June 1964 issue of ''[[Analog Science Fiction and Fact]]'', with the comment that "this outrageous piece of draftsmanship evidently escaped from the Finagle & Diddle Engineering Works" (although something else called a "hole location gauge" had already been patented in 1961<ref>{{cite web |url=http://www.freepatentsonline.com/2998656.html |title=Hole location gauge - Patent 2998656 |publisher=Freepatentsonline.com |date=1961-09-05 |accessdate=2010-10-22}}</ref>). |
The word "poiuyt" appeared on the March 1965 cover<ref>{{cite web |url=http://madcoversite.com/mad093.html |title=Doug Gilford's Mad Cover Site - Mad #93 |publisher=Madcoversite.com |date= |accessdate=2010-10-22}}</ref> of ''[[Mad (magazine)|Mad]]'' magazine bearing the four-eyed [[Alfred E. Neuman]] balancing the impossible fork on his finger with caption "Introducing 'The Mad Poiuyt' " (the last six letters on the top row of many Latin-script [[typewriter]] keyboards, right to left), and has appeared numerous times since then. An anonymously-contributed version described as a "hole location gauge" was printed in the June 1964 issue of ''[[Analog Science Fiction and Fact]]'', with the comment that "this outrageous piece of draftsmanship evidently escaped from the Finagle & Diddle Engineering Works" (although something else called a "hole location gauge" had already been patented in 1961<ref>{{cite web |url=http://www.freepatentsonline.com/2998656.html |title=Hole location gauge - Patent 2998656 |publisher=Freepatentsonline.com |date=1961-09-05 |accessdate=2010-10-22}}</ref>). |
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In December 1968 American optical designer and artist [[Roger Hayward]] wrote "Blivets: Research and Development" for ''[[The Worm Runner's Digest]]'' in which he presented interpretations of the blivet.<ref>{{cite book |title=Mathematical Circus |last=Gardner |first=Martin |authorlink=Martin Gardner |publisher=[[Pelican Books]] |year=1981 |page=5}}</ref> |
In December 1968 American optical designer and artist [[Roger Hayward]] wrote "Blivets: Research and Development" for ''[[The Worm Runner's Digest]]'' in which he presented interpretations of the blivet.<ref>{{cite book |title=Mathematical Circus |last=Gardner |first=Martin |authorlink=Martin Gardner |publisher=[[Pelican Books]] |year=1981 |page=5}}</ref> |
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Revision as of 01:09, 15 March 2016
An impossible trident,[1] also known as an impossible fork,[2] a blivet,[3] poiuyt, devil's fork[citation needed] is a drawing of an impossible object (undecipherable figure), a kind of an optical illusion. It appears to have three cylindrical prongs at one end which then mysteriously transform into two rectangular prongs at the other end.
The graphic artist M. C. Escher used these types of figures as the basis for impossible three-dimensional compositions in many of his woodcut prints.[citation needed]
The word "poiuyt" appeared on the March 1965 cover[4] of Mad magazine bearing the four-eyed Alfred E. Neuman balancing the impossible fork on his finger with caption "Introducing 'The Mad Poiuyt' " (the last six letters on the top row of many Latin-script typewriter keyboards, right to left), and has appeared numerous times since then. An anonymously-contributed version described as a "hole location gauge" was printed in the June 1964 issue of Analog Science Fiction and Fact, with the comment that "this outrageous piece of draftsmanship evidently escaped from the Finagle & Diddle Engineering Works" (although something else called a "hole location gauge" had already been patented in 1961[5]).
In December 1968 American optical designer and artist Roger Hayward wrote "Blivets: Research and Development" for The Worm Runner's Digest in which he presented interpretations of the blivet.[6]
Notes
- ^ Andrew M. Colman, A Dictionary of Psychology, Oxford University Press, 2009, ISBN 0199534063, p. 369
- ^ Article "Impossible Fork" at MathWorld
- ^ The Hacker's Dictionary, article "Blivet"; It lists the impossible fork among numerous meanings of the term
- ^ "Doug Gilford's Mad Cover Site - Mad #93". Madcoversite.com. Retrieved 2010-10-22.
- ^ "Hole location gauge - Patent 2998656". Freepatentsonline.com. 1961-09-05. Retrieved 2010-10-22.
- ^ Gardner, Martin (1981). Mathematical Circus. Pelican Books. p. 5.
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