Cardinality and Rank Nullity Theorem
32458
Does the rank-nullity theorem hold for infinite dimensional $V$?
110381
Prove that if rank(A + B) = rank(A) + rank(B), then col(A) ∩ col(B) = {0}
101669
Cardinality of the Set of all finite subset of $\mathbb{R}$
79568
Cardinality of the set $D$
150064
Cardinality of "$x-y\in\Bbb Q$"-equivalence class of $1/\sqrt2$
7785
Cardinality of sum-set
86421
Proof of the definition of cardinal exponentiation
82628
Cardinality of a set of closed intervals
142631
Show that A has the same cardinality as $A\setminus\{x,y,z\}$
111954
Computing the cardinality of a combinatorial set
48660
Proof that determinant rank equals row/column rank
9158
Proving that a propositional theory of any cardinality has an independent set of axioms
127233
Cardinality of order types in $\mathbb{N}$
153823
$|\text{rank}A-\text{rank}B|\leq \text{rank}(A+B)$
63489
The class of cardinal numbers is well ordered
135760
Can proper classes also have cardinality?
113863
The non-existence of non-principal ultrafilters in ZF