Regarding chains and antichains in a partially ordered infinite space
6478
Prove that for any infinite poset there is an infinite subset which is either linearly ordered or antichain.
27478
Proof that two basis of a vector space have the same cardinality in the infinite-dimensional case
82464
$U^*\otimes V$ versus $L(U,V)$ for infinite dimensional spaces
33008
Linear order where every initial segment is finite
120522
Showing any countable, dense, linear ordering is isomorphic to a subset of $\mathbb{Q}$
127687
Proof of the duality of the dominance order on partitions
22482
How can an ordered pair be expressed as a set?
66301
The cardinality of the set of countably infinite subsets of an infinite set
91178
chain of divisibility relation
100061
The Maximum possible order for an element $S_n$
87451
Construction of matrices under ZFC axioms
47630
Endomorphisms of modules satisfying chain conditions and counterexamples.
21176
Closure of the set in dictionary order topology.
30003
Proving that Order for N is Anti-symmetric
63276
Is an arbitrary union of a chain of countable sets countable?
155777
Show that infinite Cartesian product is uncountable
131163
There is a well ordering of the class of all finite sequences of ordinals