Is every mathematical object representable by sets?
5964
Are there areas of mathematics (current or future) that cannot be formalized in set theory?
123380
Built in support for sets in PHP?
98355
Is the set of all possible binary strings countable?
154098
Why does mathematical convention deal so ineptly with multisets?
52451
Ordered Triples and Set Theory
70196
Is there any well-ordered uncountable set of real numbers under the original ordering?
129163
Showing that every positive integer can be represented in this form
40937
Is the set of partial order relations over $ \mathbb{N}$ countable?
95373
Additive set function on a semiring of sets
158671
Cardinality of a set that consists of all existing cardinalities
22498
In set theory, how are real numbers represented as sets?
93330
Cardinality of all cardinalities
141299
Alternative set theories
95524
Is everything in Mathematica ultimately stored as a rule?
22482
How can an ordered pair be expressed as a set?
25769
Finding all posets on a set
28539
Does any uncountable set contain two disjoint uncountable sets?