Dehn’s lemma

The Dehn’s lemma states that if a continuous mapMathworldPlanetmath from a 2-disk ( to a 3-manifold f:D2M for which f-1fD2=D2, then there exists an embeddingMathworldPlanetmathPlanetmath g:D2M such that the restrictionsPlanetmathPlanetmath g| and f| are equal.

Title Dehn’s lemma
Canonical name DehnsLemma
Date of creation 2013-03-22 15:45:32
Last modified on 2013-03-22 15:45:32
Owner juanman (12619)
Last modified by juanman (12619)
Numerical id 11
Author juanman (12619)
Entry type Theorem
Classification msc 57M35
Synonym Dehn’s lemma
Related topic 3Manifolds