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user102822's user avatar
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user102822
  • Member for 6 years, 11 months
  • Last seen more than 5 years ago
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  • Mathematics
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  • MathOverflow
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    Teacher
    Dec 24, 2016
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Top network posts
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47
Why study finite-dimensional vector spaces in the abstract if they are all isomorphic to $R^n$?
13
How can I show that a bijection between $[0,1)$ and $(0,1)$ cannot be continuous?
11
Collection of surprising identities and equations.
11
If $a_n+b_n\sqrt{3}=(2+\sqrt{3})^n$, then what's $\lim_{n\rightarrow\infty}\frac{a_n}{b_n}$?
9
Show that:$\prod_{n=1}^{\infty}\left({2n\over 2n-1}\right)^2\left(\cdots\right)={\pi\over2}\cdot{\phi\over5}\cdot\sqrt{\phi\sqrt{5}}$
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