Products to Sums and Sums to Products Identitites
5080
How can we sum up $\sin$ and $\cos$ series when the angles are in arithmetic progression?
74058
Sums and products of algebraic numbers
102383
Associativity of Cartesian Product
52973
The identity $(u\times v)\cdot(x\times y)=\begin{vmatrix}u\cdot x&v\cdot x\\ u\cdot y&v\cdot y\\\end{vmatrix}$
56945
What does the math notation $\sum$ mean?
147903
Similar matrices-Identity
155479
Summation of inner products
7785
Cardinality of sum-set
145900
Proof of a double summation reduction identity
39957
Product of binomial coefficient as a basis
59644
Proof of Cartesian product intersection
28925
Can the Identity Map be a repeated composition one other function?
39724
Combinatorial Identities
142978
combinatorics: sum of product of integer compositions
87636
A Product function for matrix products
76510
vector identity for triple scalar product
143541
Decomposition of an algebraic number into a sum or product of algebraic numbers with smaller degree