1
We conclude with a brief mention of free inverse semigroups.
Throughout what follows, we shall freely use without explicit mention the elementary fact that......
2
[sth; doing sth; see also: allude, refer] In [5] he mentions having proved that for g≥ 1.
One more case merits mentioning here.
the above-mentioned element
the last-mentioned map
the problem mentioned [Not: “the mentioned problem'']