For full treatment, see MACROPAEDIA: Topology. ... A broadening influence originated in Georg Cantora#39;s studies of number theory and set theory. ... Both men noted that for any polyhedron without holes, the number of vertices plus the number of faces minus the number of edges is 2. .... Consult the INDEX first Toprakkale, also spelled TOPRA KAU n, ancient Urartian fortress located near modern Van inanbsp;...

Title | : | The New Encyclopædia Britannica: Micropædia |

Author | : | Encyclopaedia Britannica, inc |

Publisher | : | - 1993 |

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