- negatively ordered groupoid
- отрицательно упорядоченный группоид
English-Russian scientific dictionary. 2008.
English-Russian scientific dictionary. 2008.
Bass–Serre theory — is a part of the mathematical subject of group theory that deals with analyzing the algebraic structure of groups acting by automorphisms on simplicial trees. The theory relates group actions on trees with decomposing groups as iterated… … Wikipedia