• van Kampen’s theorem via covering spaces

    Updated: 2012-10-28 17:07:36
    If is a connected topological manifold, and is a point in , the (topological) fundamental group of at is traditionally defined as the space of equivalence classes of loops starting and ending at , with two loops considered equivalent if they are homotopic to each other. (One can of course define the fundamental group for [...]

  • Graphing Equations Is Useful, III

    Updated: 2012-10-17 22:54:23
    Graphing Equations Is Useful for solving a system of equations that are obtained by iterations on the same function

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