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安裝中文字典英文字典辭典工具!
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- If $ABBA-BAAB=A-B$, show $\operatorname {tr} (A^2)=\operatorname {tr . . .
That is, there seems to be fairly strong symbolic evidence that for $n=4$, if $ABBA-BAAB = A-B$ and $A$ is nilpotent, then $B^4 = \lambda I$ for some $\lambda$
- $A^2=AB+BA$. Prove that $\det (AB-BA)=0$ [duplicate]
I get the trick Use the fact that matrices "commute under determinants" +1
- How to calculate total combinations for AABB and ABBB sets?
Although both belong to a much broad combination of N=2 and n=4 (AAAA, ABBA, BBBB ), where order matters and repetition is allowed, both can be rearranged in different ways: First one: AABB, BBAA,
- prove $\\Gamma(a)\\Gamma(b) = \\Gamma(a+b)B(a,b)$ using polar . . .
Are you required to make it wiht polar transformation? Because with the change $x=uv$ $y=u (1-v)$ it's easier
- How many $4$-digit palindromes are divisible by $3$?
Hint: in digits the number is $abba$ with $2 (a+b)$ divisible by $3$
- CW complex for Möbius strip and its homeomorfisams
According to this question, there is CW complex with one 0-cell,one 1-cell and one 2-cell No such CW structure exists on the the Möbius strip Moreover the linked question doesn't claim that, and the answer that claimed that was deleted It is well known that the Euler characteristic of the Möbius strip is zero Because given a one $0$ -cell, two $1$ -cells, and one $2$ -cell structure
- Matrices - Conditions for $AB+BA=0$ - Mathematics Stack Exchange
There must be something missing since taking $B$ to be the zero matrix will work for any $A$
- discrete mathematics - Minimum number of states of a DFA recognizing . . .
The minimum number of states in min DFA of regular expression $(a+b)^*b(a+b)$ is _____ My attempt: I have drawn this DFA and found the answer to be 3: Somewhere it was explained that we need "trap"
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