diffhistΣ-algebra06:19+86151.84.220.193talk(There was a mistake in the comparison with the concept of topology of a set since also uncountable unions are allowed by the definition of topology. Also it's specified that a topology may not contain its complements so to make clear that a sigma algebra is not necessary a topology as well.)Tag: Visual edit
diffhistCardinality15:29035.21.79.36talk(fixed the in-article link on "Pre-Cantorian Set theory", it should actually send one to the spot in the article now. It didn't previously because the S in Set wasn't capitalized.)