pseudointersectionとは 意味・読み方・使い方

名詞

pseudointersection (複数形 pseudointersections)

1. (mathematics) A set for which the number of elements that are not in the intersection (of two infinite sets) is finite.
   • 2016, Jörg Brendle, Barnabás Farkas, Jonathan Verner, “Towers in filters, cardinal invariants, and Luzin type families”, in arXiv‎^[1]:

     We investigate which filters on ${\displaystyle \omega }$ can contain towers, that is, a modulo finite descending sequence without any pseudointersection (in ${\displaystyle [\omega ]^{\omega }}$).