Ehresmann's lemma

<h2 id="see-also">See also</h2>
<ul><li><a href="/facts/Thom%2527s_first_isotopy_lemma/oCYpHU3c">Thom's first isotopy lemma</a></li></ul>

<ul><li><a href="/facts/Charles_Ehresmann/KNtePSlk">Ehresmann, Charles</a> (1951), "Les connexions infinitésimales dans un espace fibré différentiable", <i>Colloque de topologie (espaces fibrés), Bruxelles, 1950</i>, Georges Thone, Liège; Masson et Cie., Paris, pp. 29–55, <a href="/facts/MR_(identifier)/uP137L11">MR</a> <a href="https://mathscinet.ams.org/mathscinet-getitem?mr=0042768">0042768</a></li>
<li>Kolář, Ivan; Michor, Peter W.; Slovák, Jan (1993). <a href="https://www.emis.de///monographs/KSM/"><i>Natural operations in differential geometry</i></a>. Berlin: <a href="/facts/Springer-Verlag/nAesf6nT">Springer-Verlag</a>. <a href="/facts/ISBN_(identifier)/15AdSPa9">ISBN</a> 3-540-56235-4. <a href="/facts/MR_(identifier)/uP137L11">MR</a> <a href="https://mathscinet.ams.org/mathscinet-getitem?mr=1202431">1202431</a>. <a href="/facts/Zbl_(identifier)/P6rFxKKx">Zbl</a> <a href="https://zbmath.org/?format=complete&q=an:0782.53013">0782.53013</a>.</li></ul>

Ehresmann's lemma open-in-new

Ehresmann's lemma