What is meaning of big U in sets?
26530
What does the big intersection or union sign of a set mean?
122947
What is the cardinality of the set of infinite cardinalities?
47697
Russell's paradox: a set cannot contain its own powerset
11849
Size of a union of two sets
73130
A simple question about open set
139826
arbitrary large finite sums of an uncountable set.
134050
Question about set notation: what does $]a,b[$ mean?
109070
Question about the proof of the distributive property for sets
71976
Is every element on a set also a set?
120712
Is there a way to define the "size" of an infinite set that takes into account "intuitive" differences between sets?
80156
Formatting the union of sets
142045
What's the definition of limit of sets(esp. ordinals) in set theory?
112523
Does $\sqsubset$ have any special meaning?
55619
What does $\bigcup_{i=0}^{\infty}[i, i+2]$ mean?
93501
Order of precedence of set operators
9330
Meaning behind Filter in Set Theory
4213
The set that only contains itself