## Mathematics Subject Classification – MSC2010

General reference works (handbooks, dictionaries, bibliographies, etc.) 14

Instructional exposition (textbooks, tutorial papers, etc.) 346

Research exposition (monographs, survey articles) 491

Explicit machine computation and programs (not the theory of computation or programming) 128

Ljusternik-Schnirelman (Lyusternik-Shnirel’man) category of a space 682

Generalized (extraordinary) homology and cohomology theories 1046

Spectra with additional structure ($E_\infty$, $A_\infty$, ring spectra, etc.) 292

Stable classes of vector space bundles, $K$-theory [See also 19Lxx] [For algebraic $K$-theory, see 18F25, 19-XX] 520