Proposition: Addition of Integers Is Associative
Addition of integers is associative, i.e. the law \[(x+y)+z=x+(y+z)\] is valid for all \(x,y,z\in\mathbb Z\).
Table of Contents
Proofs: 1 2
Mentioned in:
Motivations: 1
Proofs: 2 3
Thank you to the contributors under CC BYSA 4.0!
 Github:

References
Bibliography
 Kramer Jürg, von Pippich, AnnaMaria: "Von den natürlichen Zahlen zu den Quaternionen", SpringerSpektrum, 2013