# nLab homotopy-homology-cohomology

| category theory || covariant hom | contravariant hom | tensor product | | homological algebra || Ext | Ext | Tor | | enriched category theory || end | end | coend | | homotopy theory || derived hom space $\mathbb{R}Hom(S^n,-)$ | cocycles $\mathbb{R}Hom(-,A)$ | derived tensor product $(-) \otimes^{\mathbb{L}} A$ |

Revised on June 29, 2012 16:50:40 by Urs Schreiber (89.204.138.61)