Universal algebra and lattice theory : proceedings of the fourth international conference, held at Puebla, Mexico, 1982 / R. S. Freese and O. C. García

Contents: Clifford Bergman, The amalgamation class of a discriminator variety is finitely axiomatizable (pp. 1–9); Joel Berman, Free spectra of 3-element algebras (pp. 10–53); Gary Brenner and Donald Monk, Tree algebras and chains (pp. 54–66); Stanley Burris, Boolean constructions (pp. 67–90); Stephen D. Comer, Extension of polygroups by polygroups and their representations using color schemes (pp. 91–103); Gábor Czédli, A characterization for congruence semidistributivity (pp. 104–110); Alan Day, Geometrical applications in modular lattices (pp. 111–141); Ralph Freese, Subdirectly irreducible algebras in modular varieties (pp. 142–152); W. Charles Holland, A survey of varieties of lattice ordered groups (pp. 153–158); Jaroslav Ježek, On join-indecomposable equational theories (pp. 159–165); Jaroslav Ježek and Tomáš Kepka, Idealfree CIM-groupoids and open convex sets (pp. 166–175); Ralph McKenzie, Finite forbidden lattices (pp. 176–205); George F. McNulty and Caroline R. Shallon, Inherently nonfinitely based finite algebras (pp. 206–231); R. S. Pierce, Tensor products of Boolean algebras (pp. 232–239); Francisco Poyatos [Francisco Poyatos Suárez], G-principal series of stocks in an algebra (pp. 240–244); Anna Romanowska, Algebras of functions from partially ordered sets into distributive lattices (pp. 245–256); I. G. Rosenberg, Galois theory for partial algebras (pp. 257–272); N. Sauer, M. G. Stone and R. H. Weedmark, Every finite algebra with congruence lattice M7 has principal congruences (pp. 273–292); M. R. Vaughan-Lee, Nilpotence in permutable varieties (pp. 293–308).