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Beilinson regulator : ウィキペディア英語版
Beilinson regulator
In mathematics, especially in algebraic geometry, the Beilinson regulator is the Chern class map from algebraic K-theory to Deligne cohomology:
:K_n (X) \rightarrow \oplus_ H_D^ (X, \mathbf Q(p)).
Here, ''X'' is a complex smooth projective variety, for example. It is named after Alexander Beilinson. The Beilinson regulator features in Beilinson's conjecture on special values of L-functions.
The ''Dirichlet regulator'' map (used in the proof of Dirichlet's unit theorem) for the ring of integers \mathcal O_F of a number field ''F''
:\mathcal O_F^\times \rightarrow \mathbf R^, \ \ x \mapsto (\log |\sigma (x)|)_\sigma
is a particular case of the Beilinson regulator. (As usual, \sigma: F \subset \mathbf C runs over all complex embeddings of ''F'', where conjugate embeddings are considered equivalent.) Up to a factor 2, the Beilinson regulator is also generalization of the Borel regulator.
== References ==

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抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)
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