2018年5月7日月曜日

Homological algebra for abelian categories

This is the development of a cohomological theory. You may call it tropical geometry.


EX.

You see P^3→P^2, so this seems to be fractal.

Bmod is the replacement for the category of abelian groups.

For all a, b in A, a • b = b • a





C admits equalizers Equ and coequalizers Coequ.

This is the natural morphism.







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