matrices - When will $AB=BA$? - Mathematics Stack Exchange
2013年8月29日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
computer science - An efficient way to determine if two context …
In some cases, it is relatively easy to prove that two formal grammars are equivalent. If two grammars generate a finite language, then you only need to compare the sets of strings …
Proofs of determinants of block matrices [duplicate]
I know that there are three important results when taking the Determinants of Block matrices $$\\begin{align}\\det \\begin{bmatrix} A & B \\\\ 0 & D \\end ...
prove $\\Gamma(a)\\Gamma(b) = \\Gamma(a+b)B(a,b)$ using …
2022年6月23日 · Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for …
How to prove $\\operatorname{Tr}(AB) = \\operatorname{Tr}(BA)$?
2015年1月11日 · The efficient @hjhjhj57: answer $$\text{Tr}(AB) = \text{Tr}(BA)= \sum a_{ij} b_{ji}$$ Now we can start to understand why if we do a circular permutation of the factors the …
linear algebra - How to show that $\det(AB) =\det(A) \det(B ...
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linear algebra - Does $\det (A + B) = \det (A) + \det (B)$ hold ...
Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their …
computer science - Find the NFA for the language $\{ w | \text{ w ...
Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their …
Show that $ e^{A+B}=e^A e^B$ - Mathematics Stack Exchange
Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their …
Are the eigenvalues of $AB$ equal to the eigenvalues of $BA$?
Stack Exchange Network. Stack Exchange network consists of 183 Q&A communities including Stack Overflow, the largest, most trusted online community for developers to learn, share their …