Is infinity an element of the natural numbers?
2742
Is infinity a number?
28942
About Math notation: the set of the first $n$ natural numbers
124472
Elements with infinite roots in $p$-adic integers
126426
Does every infinite finitely generated group contains an element of infinite period?
135222
What are the consequences if Axiom of Infinity is negated?
127200
Are there fields and ordered fields of every infinite cardinality?
22423
Which infinity is meant in limits?
97005
A number smaller than negative infinity in python?
108922
Cardinality and infinite sets: naturals, integers, rationals, bijections
16971
Prove that no ordinal is an element of itself
100333
Show A is countable infinity
149853
What infinity is greater than the continuum? Show with an example
49709
Suppose $X$ is infinite and $A$ is a finite subset of $X$. Then $X$ and $X \setminus A$ are equinumerous
63748
What does it mean that the universe is "infinite"?
79419
Is $\sin \infty$ an indeterminate form?
20680
Does infinity exist in physical systems?
47720
Isomorphism from Natural numbers to the Odd Natural numbers