Jul 4, 2011 · I need tricks or shortcuts to find the inverse of $2 \\times 2$ and $3 \\times 3$ matrices. I have to take a time-based exam, in which I have to find the inverse of square …

Dec 16, 2019 · Formula for the inverse of a block-matrix Ask Question Asked 5 years, 11 months ago Modified 2 years, 4 months ago

The proof that your expression really is the inverse of $\;A\;$ is pretty easy. How it is derived can be done as follows without deep knowledge in matrix theory:

Jan 4, 2015 · Prove the formula for the inverse of a matrix Ask Question Asked 12 years, 7 months ago Modified 3 years, 5 months ago

Explicit formula for inverse matrix elements Ask Question Asked 11 years, 1 month ago Modified 11 years, 1 month ago

18 Actually, we can directly calculate the derivate of a matrix starting from the definition of the derivate of functions.

1 Check this question. The first answer presents a recursive formula to retrieve the inverse of a generic sum of matrices. So yours should be a special case.

May 24, 2015 · Are we talking about "On the Inverse of the Sum of Matrices" or any other work? (In any case, I find this property quite useful, just need to cite it properly).

16 Computing the inverse misses the whole point of factorizing into triangular matrices. If you have a triangular matrix, you should almost never need to compute the inverse, because …

Nov 23, 2015 · Since the pseudo-inverse of a matrix is unique, is there a good formula that we can use to simplify our calculation in obtaining the pseudo-inverse, in place of compact …