the rank one tensors’ basis changes
Einstein-Penrose ‘s strong sum convention
Filed under math, mathematics, multilinear algebra, word algebra
splitting into handlebodies
Filed under 3-manifold, 3-manifolds, fiber bundle, low dimensional topology
short exact sequence and center
Let us prove:
Let be a short exact sequence, if the center then
Proof: When then , so .
Therefore
Filed under 3-manifold, algebra, group theory, word algebra
Pascal’s Rule and double induction
If is a set with and such that then there are different of them.
Follow the link pascalbernoulli for a double induction proof.
Filed under math
three jordan two-by-two matrices and exponential
Filed under math