## Mathematics Subject Classification – MSC2010

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

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

Research exposition (monographs, survey articles) 495

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

Ljusternik-Schnirelman (Lyusternik-Shnirel’man) category of a space 687

Generalized (extraordinary) homology and cohomology theories 1051

Spectra with additional structure ($E_\infty$, $A_\infty$, ring spectra, etc.) 299

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