Talk:Lefschetz fixed-point theorem Source: en.wikipedia.org/wiki/Talk:Lefschetz_fixed-point_theorem

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is defined arbitrarily for maps ${\displaystyle X\rightarrow X}$, then if we use the identity map we get ${\displaystyle \Lambda _{id}=\#(\Delta ,\Delta ,M\times M)=\chi (M)}$ is the intersection number of the diagonal with itself in the product manifold ${\displaystyle M\times M}$, i.e., the Euler characteristic. On the algebraic topological level I'm sure this holds too, that ${\displaystyle \chi (M)=\Lambda _{id}(M)}$. Anyone know more about this? MotherFunctor 05:55, 28 May 2006 (UTC)[reply]

The connection is now explained.24.58.63.18 (talk) 19:07, 4 June 2009 (UTC)[reply]

it would be nice to have a reference (to look up proofs) for the statements about the Frobenius. --79.83.77.245 (talk) 00:49, 19 January 2010 (UTC)[reply]