For ten points, identify this algebraic operation denoted by an encircled plus sign.
The Whitney sum is also known as the this bundle. When performing this operation, the output must have a  nite number of nonzero elements. This operation comes equipped with a projection and coprojection homomorphism. This operation is a biproduct when it is performed over a  nite number of modules, and it is always a coproduct in the appropriate category for the objects on which it asks. For a  nite number of sets, this operation is equal to the   Cartesian product of those sets, and for an in nite number of Abelian groups, this operation on the groups is a proper subset of their direct product. For ten points, identify this algebraic operation denoted by an encircled plus sign.
The Whitney sum is also known as the this bundle. When performing this operation, the output must have a  nite number of nonzero elements.
direct sum [prompt on sum, prompt on addition]