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| bio | website | |
|---|---|---|
| location | Russia | |
| age | ||
| visits | member for | 1 year |
| seen | Apr 22 at 18:10 | |
| stats | profile views | 10 |
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Jun 6 |
comment |
Is $f$ injective in $W$? Thanks. It's mean that the proof of this expression is in definition of injective function. $f(x) = f(y) => x=y $ |
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Jun 6 |
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Is $f$ injective in $W$? @AdenDong, you are right. Thanks |
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May 28 |
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Prove an inequality about $\arctan 1/(nx)$ for any $x$ and $n$ @Didier, I'm sorry, I was wrong. And then, after showed? |
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May 28 |
comment |
Prove an inequality about $\arctan 1/(nx)$ for any $x$ and $n$ Didier, thanks. How to show it? I thought that $$ \tan(u)< u $$ |
