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7 votes
0 answers
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Relation between the additive Haar measure on $(K,+)$ and the multiplicative Haar measure on $K^{*}$ for a global field $K$

The following question comes from my studying of Alain Connes's paper Trace Formula in Noncommutative Geometry and the Zeros of the Riemann Zeta Function. In it, on p. 11, Connes notes that if $K$ is ...
The Thin Whistler's user avatar
9 votes
1 answer
346 views

Is there a uniform solution of the Ruziewicz problem?

For any integer $n\geq 2$ there is one and only one (up to rescaling) rotation-invariant, finitely-additive measure on the Lebesgue $\sigma$-algebra of $S^n$. The proof of this statement I'm aware of ...
ruze's user avatar
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