Source: wikibot/thom-s-second-isotopy-lemma
= Thom's second isotopy lemma
{wiki=Thom's_second_isotopy_lemma}
Thom's second isotopy lemma is a result in the field of topology, particularly in the study of manifolds and their embeddings. This lemma is concerned with how certain isotopies (continuous deformations) of maps can be handled in the presence of singularities.