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Submersion (mathematics)
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<p>In <a href="/facts/Mathematics/pxTouaz4">mathematics</a>, a submersion is a <a href="/facts/Differentiable_map/jQqTgLk1">differentiable map</a> between <a href="/facts/Differentiable_manifold/aSnbXKcV">differentiable manifolds</a> whose <a href="/facts/Pushforward_(differential)/xLsoLwVH">differential</a> is everywhere <a href="/facts/Surjective/KezhLpCb">surjective</a>. It is a basic concept in <a href="/facts/Differential_topology/Y21eGQe0">differential topology</a>, dual to that of an <a href="/facts/Immersion_(mathematics)/QMqIgkVY">immersion</a>. </p>