On Embeddability of Idempotent Separating Extensions of Inverse Semigroups Bernd BillhardtIstván Szittyai Pages: 26 - 31
Minimal and Maximal Semigroups Related to Causal Symmetric Spaces Andreas NeumannGestur Ólafsson Pages: 57 - 85
Finitely Presented, Coherent, and Ultrasimplicial Ordered Abelian Groups J. F. CaillotF. Wehrung Pages: 116 - 137