Codimension 2

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(Cech cohomology and the Hodge conjecture in codim 1)
(Elementary algebraic K-Theory: K_2)
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* Mention the description as universal central extension.
 
* Mention the description as universal central extension.
 
* Mention that and how <math>K_2(R)</math> is a module over <math>K_0(R)</math>.
 
* Mention that and how <math>K_2(R)</math> is a module over <math>K_0(R)</math>.
* Introduce the symbol <math>\{a, b\} \in K_2(R)</math> for element <math>a, b \in R</math> of a commutative ring <math>R</math>.
+
* Introduce the symbol <math>\{a, b\} \in K_2(R)</math> for a pair of elements <math>a, b \in R</math> of a commutative ring <math>R</math>.
 
Theorem 8.8<ref name="Mil71"/> interprets the symbol as bimultiplicative skew-symmetric map  
 
Theorem 8.8<ref name="Mil71"/> interprets the symbol as bimultiplicative skew-symmetric map  
  

Revision as of 12:42, 6 April 2016

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