Codimension 2
From Mathematics
(→Elementary algebraic K-Theory: K_2) |
(→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>. | ||
* Introduction of Milnor K-groups <math>K_n^M</math> and proof of the statement | * Introduction of Milnor K-groups <math>K_n^M</math> and proof of the statement | ||