id	author	title	date	pages	extension	mime	words	sentence	flesch	summary	cache	txt
ejpam-221	Hollings, Christopher	From right PP monoids to restriction semigroups: a survey	2009	37	.pdf	application/pdf	12713	979	77	We record some of the basic results in the theory of left restriction semigroups, before moving on to Section 5, where we consider the special case of left ample semigroups. Just as we did for left restriction semigroups, we now provide an abstract characterisation of left ample semigroups.	cache/ejpam-221.pdf	txt/ejpam-221.txt