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ekkert breytingarágrip
(Ný síða: right|thumb|An involution is a function <math>f:X\to X,</math> which, when applied twice, brings one back to the starting point. '''Sjálfhverfa'''<ref name=...) |
mEkkert breytingarágrip |
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: ''f''(''f''(''x'')) = ''x'' fyrir öll ''x'' í [[formengi]] ''f''.<ref>{{Citation|last=Russell|first=Bertrand|title=Principles of mathematics|year=1903|publisher=W. W. Norton & Company, Inc|pages=page 426|url=http://books.google.com/books?id=63ooitcP2osC&lpg=PR3&dq=involution%20subject%3A%|edition=2nd|isbn=9781440054167}}</ref>
==
<div class="references-small"><references/></div>
== Tengt efni ==
* [[ROT13]]
* [[Sjálfmótun]]
[[eo:Involucio]]
[[fr:Involution (mathématiques)]]
[[it:Involuzione (teoria degli insiemi)]]
[[he:אינוולוציה]]
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