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inverse function theorem

   Also found in: Wikipedia 0.01 sec.
inverse function theorem [′in‚vərs ′fənk·shən ‚thir·əm]
(mathematics)
If ƒ is a continuously differentiable function of euclideann-space to itself and at a pointx0the matrix with the entry (∂ƒi/∂xj)x0in theith row andjth column is nonsingular, then there is a continuously differentiable functiong(y) defined in a neighborhood of ƒ(x0) which is an inverse function for ƒ(x) at all points nearx0.


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