1,536 reputation
825
bio website fuz.su/~fuz
location Berlin, Germany
age 19
visits member for 3 years, 8 months
seen Jul 16 at 0:07

I am a student of computer science and mathematics at the Humboldt University of Berlin.


Mar
31
comment Why is it impossible to define multiplication in Presburger arithmetic?
@MJD Presburger arithmetic is an axiomatic system. People claim that it is impossible to define multiplication within this system. Why?
Mar
30
asked Why is it impossible to define multiplication in Presburger arithmetic?
Mar
4
awarded  Good Question
Jan
1
awarded  Yearling
Dec
12
awarded  Nice Question
Dec
5
awarded  Nice Answer
Oct
31
awarded  Taxonomist
Oct
23
awarded  Popular Question
Oct
18
asked Squaring modulo n — is there a systematic way to generate the fixpoints?
Sep
30
awarded  Popular Question
Sep
8
revised The inverse of the inscribed angle theorem
added 44 characters in body
Sep
8
comment The inverse of the inscribed angle theorem
I am sorry. I usually don't ignore the orientation of angles. I should've made that clear beforehand.
Sep
8
comment The inverse of the inscribed angle theorem
Nice and easy. Thank you!
Sep
8
accepted The inverse of the inscribed angle theorem
Sep
8
comment The inverse of the inscribed angle theorem
In the second case, the sign of the angle $\angle ACB$ is negative. The equation $2\angle ACB=\angle AMB$ does not holds if the signs do not match.
Sep
8
comment The inverse of the inscribed angle theorem
@Karolis I fixed the error. My bad :-(
Sep
8
revised The inverse of the inscribed angle theorem
deleted 11 characters in body
Sep
8
comment The inverse of the inscribed angle theorem
@KarolisJuodelÄ— No. C can be anywhere but the constraint on the angle $\angle ACB$ must hold.
Sep
8
asked The inverse of the inscribed angle theorem
Jun
21
comment Evaluating $\int_0^{\sqrt{3}}{\frac{\sqrt{1+x^2}}{x}}\,dx$
Try wolframalpha.com for evaluating integrals. It even shows a step-by-step-solution!