A large binary operator representing direct sums of algebraic structures like vector spaces or modules.
Examples
Direct sum of vector spaces
V = V_1 \bigoplus V_2 \bigoplus V_3
Direct sum of modules
M = \bigoplus_{i=1}^n M_i
External direct sum of groups
G = \mathbb{Z}_2 \bigoplus \mathbb{Z}_3 \bigoplus \mathbb{Z}_4