= meagre set = set of first category

olemus
topoloogilise ruumi alamhulk, mis on
esitatav loenduva hulga eikusagil tihedate hulkade ühendina
=
a small or negligible subset of a topological space: a countable union of nowhere dense subsets of this topological space

ülevaateid
https://dbpedia.org/page/Meagre_set

https://mathworld.wolfram.com/MeagerSet.html

https://en.wikipedia.org/wiki/Meagre_set

näiteid
https://www.quora.com/Are-irrational-numbers-meager-in-the-reals

https://projecteuclid.org/download/pdf_1/euclid.rae/1214571375