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Poincaré-Birkhoff fixed-point theorem |
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Poincaré-Birkhoff fixed-point theorem [‚pwän·kə¦rā ′bərk‚hȯf ¦fikst ¦pȯint ′thir·əm] (mathematics) The theorem that a bijective, continuous, area-preserving mapping of the ring between two concentric circles onto itself that moves one circle in the positive sense and the other in the negative sense has at least two fixed points. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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