The cotangent bundle of a manifold is similar to the tangent bundle, except that it is the set where and is a dual vector in the tangent space to . The cotangent bundle is denoted .
See alsoTangent Bundle
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Weisstein, Eric W. "Cotangent Bundle." From MathWorld--A Wolfram Web Resource. https://mathworld.wolfram.com/CotangentBundle.html