Give a description of the topic, and what you hope the reader will get from this. For example, this page will cover addition of the natural numbers. Talk about how this relates to something in cryptography, either through a protocol, or an attack. This can be a single sentence, or verbose.
For all integers, the addition operation is
Contains an identity element:
Has an inverse for every element:
sage: 1 + (2 + 3) == (1 + 2) + 3Truesage: 1 + 2 == 2 + 1Truesage: 5*(7 + 11) == 5*7 + 5*11Truesage: sum(i for i in range(1000))^2 == sum(i^3 for i in range(1000))True