Direct product versus direct sum
50114
A question about direct sums and products of modules
123595
Representations of Direct Sum of Lie Algebras
85222
Direct sum of finitely-many non-abelian groups
59934
What is the term for a factorial type operation, but with summation instead of products?
123828
finite and infinite product of discrete space
18465
Sum and product of two transcendental numbers can't be both algebraic
25553
elementary set theory (cartesian product and symmetric difference proof)
109675
Finite sum of eigenspaces (with distinct eigenvalues) is a direct sum
99257
Dot Product Intuition
88728
Dimensions of vector subspaces in a direct sum are additive
114142
How to show that $\mathbb{R}^3$ is the direct sum of $W_1={\rm span}\{(1,1,1)\}$ and $W_2={\rm span}\{(1,0,0),(1,1,0)\}$?
72295
A difficulty in understanding the proof of distributivity of tensor products over direct sums for modules.
113259
The confusing nature of direct sum for finite abelian groups
5741
Direct product of abelian groups
107726
Why sum of two little "o" notation is equal little "o" notation from sum?
91276
difference between dot product and inner product
26592
The symmetric Difference