Commutative Semigroups [Hardcover]

Preface. General structure theory: I. Elementary properties. II. Cancellative semigroups. III. Semilattice decompositions. IV. Subdirect decompositions. V. Group coextensions. VI. Finitely generated semigroups. VII. Subcomplete semigroups. VIII. Other results. Congruences: IX. Nilsemigroups. X. Group-free semigroups. XI. Subcomplete semigroups. Cohomology: XII. Commutative semigroup cohomology. XIII. The overpath method. XIV. Semigroups with zero cohomology. References. Author. Index. Notation. Index.