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• Lefschetz theory for coincidences
  Let $F$ be a closed submanifold of $N.$ We say that $F$ ''satisfies condition (*)'' if one of the following
  19 KB (3,563 words) - 15:20, 9 December 2012
• Higher order Nielsen numbers by Saveliev
  ...general is the [[preimage problem]]. For a map $f:X\rightarrow Y$ and a [[submanifold]] $Y$ of $Z$, it studies the [[preimage]] set $C=\{ x:f(x)\in Y\} $, and th
  2 KB (370 words) - 16:32, 26 March 2011
• Tangent cone
  We define the ''tangent space'' of submanifold $M$ of ${\bf R}^n$ at $x$ as:
  5 KB (882 words) - 02:14, 26 March 2013