Codimension 2
From Mathematics
(→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 | + | * 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 | ||