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In mathematics, the Poincaré–Miranda theorem is a generalization of the intermediate value theorem, from a single function in a single dimension, to n functions in n dimensions. It says as follows: Consider continuous functions of variables, . Assume that for each variable , the function is constantly nonpositive when and constantly nonnegative when . Then there is a point in the -dimensional cube in which all functions are simultaneously equal to .

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  • Poincaré–Miranda theorem (en)
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  • In mathematics, the Poincaré–Miranda theorem is a generalization of the intermediate value theorem, from a single function in a single dimension, to n functions in n dimensions. It says as follows: Consider continuous functions of variables, . Assume that for each variable , the function is constantly nonpositive when and constantly nonnegative when . Then there is a point in the -dimensional cube in which all functions are simultaneously equal to . (en)
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  • In mathematics, the Poincaré–Miranda theorem is a generalization of the intermediate value theorem, from a single function in a single dimension, to n functions in n dimensions. It says as follows: Consider continuous functions of variables, . Assume that for each variable , the function is constantly nonpositive when and constantly nonnegative when . Then there is a point in the -dimensional cube in which all functions are simultaneously equal to . The theorem is named after Henri Poincaré, who conjectured it in 1883, and Carlo Miranda, who in 1940 showed that it is equivalent to the Brouwer fixed-point theorem. (en)
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