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  1. What does $QAQ^{-1}$ actually mean? - Mathematics Stack …

    Apr 28, 2020 · 1 $\begingroup$ When one thinks of matrix products like that, it's helpful to remember that matrices, unlike vectors, have two sets of bases: one for the domain and one …

  2. Why is $1^{\\infty}$ considered to be an indeterminate form

    The indeterminate forms are often abbreviated with stuff like "$1^\infty$" but that's not what they mean. This "$1^\infty$" (in regards to indeterminate forms) actually means: when there is an …

  3. Proof that $(AA^{-1}=I) \\Rightarrow (AA^{-1} = A^{-1}A)$

    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 …

  4. 有问题,就会有答案 - 知乎

    知乎,中文互联网高质量的问答社区和创作者聚集的原创内容平台,于 2011 年 1 月正式上线,以「让人们更好的分享知识、经验和见解,找到自己的解答」为品牌使命。知乎凭借认真、专业 …

  5. Why is $1$ not a prime number? - Mathematics Stack Exchange

    actually 1 was considered a prime number until the beginning of 20th century. Unique factorization was a driving force beneath its changing of status, since it's formulation is quickier if 1 is not …

  6. If $A A^{-1} = I$, does that automatically imply $A^{-1} A = I$?

    Mar 30, 2020 · A-1 A means that first we apply A transformation then we apply A-1 transformation. When we apply A transformation we reach some plane having some different basis vectors but …

  7. Series expansion: $\frac{1}{(1-x)^n}$ - Mathematics Stack Exchange

    Dec 2, 2024 · What is the expansion for $(1-x)^{-n}$? Could find only the expansion upto the power of $-3$. Is there some general formula?

  8. Double induction example: $ 1 + q + q^2 - Mathematics Stack …

    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 …

  9. 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 …

  10. 知乎 - 知乎

    有问题,上知乎。知乎,可信赖的问答社区,以让每个人高效获得可信赖的解答为使命。知乎凭借认真、专业和友善的社区氛围,结构化、易获得的优质内容,基于问答的内容生产方式和独特 …

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