the.com/commutative
order is a suggestion, not a rule.
means an operation where swapping the order of the inputs doesn't change the result, like a plus b equals b plus a.
from from french commutatif, coined by mathematician francois servois in 1814 while sorting which operations play nice with rearrangement.
addition qualifies2+3 equals 3+2, always
subtraction fails5-2 does not equal 2-5
matrices misbehavemost matrix multiplication is not commutative
groups get namedcommutative groups are called abelian, after niels abel