Flamenco, circus, wildlife and cabaret… Owe Sandström, the designer behind ABBA’s costumes, explains the thought processes behind some of the Swedish band’s most iconic looks.
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 $\lambda$.
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,
Because abab is the same as aabb. I was how to solve these problems with the blank slot method, i.e. _ _ _ _. If I do this manually, it's clear to me the answer is 6, aabb abab abba baba bbaa baab Which is the same as $$\binom {4} {2}$$ But I don't really understand why this is true? How is this supposed to be done without brute forcing the ...
Hint: in digits the number is $abba$ with $2 (a+b)$ divisible by $3$.
Among the things Sweden is known for are tech innovation and ABBA. For the past two years, while fashion has been buzzing about NFTs, the members of the band (median age 75), have been working on a ...