the set $\{xm + ny : x,y \in Z^+\}$ contains all but a finite number of the positive integers.
40080
Sum of multiples of $2$ coprime numbers cover positive integers
79568
Cardinality of the set $D$
33810
Proving there are an infinite number of pairs of positive integers $(m,n)$ such that $\frac{m+1}{n}+\frac{n+1}{m}$ is a positive integer
9651
Cardinality of cartesian product of an infinite set with N
129438
Gaussian Integers and Quotient Rings
156660
The set of all strictly increasing sequences of natural numbers
152638
The set of integers $n$ expressible as $n=x^2+xy+y^2$
104339
Prove that all but finite number of members of sequence are positive if limit is positive
42603
How can I prove that the cadinality of a set minus a finite number of elements of it is still the same as the original set?
41661
Show that the set of all finite subsets of $\mathbb{N}$ is countable.
126161
Interesting property of finite integer sequence with sum 1
39740
What is larger -- the set of all positive even numbers, or the set of all positive integers?
144787
Show that the set of all infinite subsets of $\mathbb{N}$ has cardinality greater than $\mathbb{N}$
142631
Show that A has the same cardinality as $A\setminus\{x,y,z\}$
104855
Prove that $N \subset Z(G)$
37183
Show that the set of all $x$ such that $x \in P$ and $x \notin Q$ exists
51687
Is the set $ \ (\mathbb{Z}_p \setminus \mathbb{Z}) \cap \mathbb{Q}$ non-empty?