18Gxx Homological algebra

• 18G05 Projectives and injectives, See also {13C10, 13C11, 16D40, 16D50}
• 18G10 Resolutions; derived functors, See also {18E25}
• 18G15 Ext and Tor, generalizations, Kunneth formula, See Also { 55U25}
• 18G20 Homological dimension, See also {13D05, 16E10}
• 18G25 Relative homological algebra, projective classes
• 18G30 Simplicial sets, simplicial objects (in a category), See also {55U10}
• 18G35 Chain complexes, See also {18E30, 55U15}
• 18G40 Spectral sequences, hypercohomology, See also {55Txx}
• 18G50 Nonabelian homological algebra
• 18G55 Nonabelian homotopical algebra
• 18G60 Other (co)homology theories (cyclic, dihedral, etc.), See also {19D55, 46L80, 58B30, 58G12}
• 18G99 None of the above but in this section