Titlebook: Lattices, Semigroups, and Universal Algebra; Jorge Almeida,Gabriela Bordalo,Philip Dwinger Book 1990 Springer Science+Business Media New Y

Exonerate

顯赫的人

On the Combinatorics of Free Algebras,In this survey paper I discuss recent results concerning free algebraic systems and I mention some old results which motivated them. There is no attempt to be comprehensive. The selection of topics is eclectic and personal but with a special emphasis on results of a combinatorial nature.

技術(shù)

impale

configuration

痛苦一下

控制

onlooker

978-1-4899-2610-4Springer Science+Business Media New York 1990

ETHER

裙帶關(guān)系

Semigroups that are Factorial from Inside or from Outside,h the multiplication operation. (Thereby ?. = {.∈? | . ≥ 0}, ? = {0, ±1, ±2,...}.) The number 441, e.g, factorizes in . in the two essentially different ways 21 ·21 = 441 = 9 ·49 into numbers which are irreducible within .. (Obviously none of these irreducible numbers can be prime within ..)