# Is absorption an axiom for a boolean algebra?

Bipolarity
According to wikipedia, absorption is an axiom for a boolean algebra. This seems incorrect to me, since I believe absorption can be proved from the other axioms (distributivity, associativity, commutativity, complement, identity).

Thoughts?

## AB' + A = AB' + A*1 = A(B'+1) = A(1) = A ##

BiP

## Answers and Replies

Bipolarity
I don't see what you see. Where is this axiom/proven box?

BiP

Mentor
To the right, with the titles "Huntington 1904 Boolean algebra axioms" and "Proven properties".