Graded algebra
= Graded algebra
A graded algebra over a field $k$ is a $k$-algebra $A=\bigoplus_{n\geq0}A_n$ whose multiplication satisfies $A_iA_j\subseteq A_{i+j}$.
= Graded algebra
A graded algebra over a field $k$ is a $k$-algebra $A=\bigoplus_{n\geq0}A_n$ whose multiplication satisfies $A_iA_j\subseteq A_{i+j}$.