Within-group sum of squares of cluster
122339
Sums-of-Squares (total, between, within): how to compute them from a Distance Matrix?
137109
Evaluating a summation of inverse squares over odd indices
17181
How to write a query for exact pairs of groups
80671
Product of sums of square is a sum of squares.
139951
Direct Sum of vector subspaces
57986
Sum of products of combinatorials
24411
Aggregate / summarize multiple variables per group (e.g. sum, mean)
135458
When is a sum of consecutive squares equal to a square?
32350
Compilation of proofs for the summation of natural squares and cubes
114863
Representing a given number as the sum of two squares.
83733
sum of polynoms of given property
137232
Bounds for the Harmonic k-th partial sum.
52903
Sum of squares of dependent Gaussian random variables
144011
Representative point of a cluster with L1 distance
133497
Group Membership Test for Permutations
102323
Nice neighborhoods of each "piece" in a manifold connected sum
5136
How to sum a variable by group