# Dan Shved

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bio website danshved.wordpress.com location Moscow, Russia age 28 member for 2 years, 1 month seen 16 hours ago profile views 1,534

I'm a graduate student at MIPT, Russia. My thesis is in the theory of groups, but I like lots of other things too )

 83 Why is $\log(\sqrt{x^2+1}+x)$ odd? 28 solving $\sqrt{3-\sqrt{3+x}}=x$. 20 $\overline{xyz} =x!+y!+z!$ 20 IMO 1987 - function 18 The product of digits equal to the sum of digits

# 10,316 Reputation

 +10 Is it true that the order of $ab$ is always equal to the order of $ba$? +10 what is total order - explanation please +10 Show that if $x>0$, then $\ln(x)\geq 1-\frac{1}{x}$ +15 Calculation of integers $b,c,d,e,f,g$ such that $\frac{5}{7} = \frac{b}{2!}+\frac{c}{3!}+\frac{d}{4!}+\frac{e}{5!}+\frac{f}{6!}+\frac{g}{7!}$

# 5 Questions

 8 How is $\mathrm{PGL}(V)$ a subgroup of $\mathrm{P\Gamma L}(V)$? 4 Motivation for Schur multipliers 3 Commas between adjectives [duplicate] 3 Books on computational complexity 1 Standard reference for Kaluzhnin's theorem

# 152 Tags

 121 group-theory × 44 76 algebra-precalculus × 9 114 functions × 5 59 calculus × 16 83 abstract-algebra × 30 53 linear-algebra × 24 82 real-analysis × 20 43 number-theory × 6 79 elementary-number-theory × 16 33 analysis × 11

# 6 Accounts

 Mathematics 10,316 rep 1031 Stack Overflow 163 rep 6 TeX - LaTeX 133 rep 3 French Language 118 rep 3 MathOverflow 111 rep 3