Definition 22.3.3. A differential graded algebra $(A, \text{d})$ is commutative if $ab = (-1)^{nm}ba$ for $a$ in degree $n$ and $b$ in degree $m$. We say $A$ is strictly commutative if in addition $a^2 = 0$ for $\deg (a)$ odd.
Definition 22.3.3. A differential graded algebra $(A, \text{d})$ is commutative if $ab = (-1)^{nm}ba$ for $a$ in degree $n$ and $b$ in degree $m$. We say $A$ is strictly commutative if in addition $a^2 = 0$ for $\deg (a)$ odd.
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