1,687 reputation
926
bio website fuz.su/~fuz
location Berlin, Germany
age 20
visits member for 3 years, 11 months
seen 23 hours ago

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


Feb
20
asked Is there a reasonable generalization of the falling factorial for real exponents?
Feb
16
comment $y''=(y')^{3} e^{y}$, some easy way to solve this non-linear differential equation?
Did you tried using Wolfram Alpha? It can also shows you a step-by-step solution.
Jan
17
accepted Question about a lemma on continuity
Jan
17
comment Question about a lemma on continuity
@Arturo Sorry. That was a translation mistake. In German, one says "stetig" to say "continuous". stetig and steady are false friends...
Jan
17
revised Question about a lemma on continuity
added 8 characters in body
Jan
17
asked Question about a lemma on continuity
Jan
8
comment Given the cartesian coordinates of four points, how to calculate the interection of two lines they form?
@J.M. Oh yeah. That looks good. THank you! BTW, is there a solution that use the $r,\vartheta$ representation instead?
Jan
8
comment Given the cartesian coordinates of four points, how to calculate the interection of two lines they form?
@J.M. Of course. This possibility is ruled out.
Jan
8
asked Given the cartesian coordinates of four points, how to calculate the interection of two lines they form?
Jan
1
awarded  Yearling
Dec
18
revised Find function if known some limit
Formatting
Dec
18
suggested approved edit on Find function if known some limit
Dec
8
awarded  Nice Question
Dec
2
comment Defining division by zero
@picakhu You are going to run into problems when calculating limits. Just consider $\lim_{n\to0}\frac{2n}n$. Using your method, one gets $\frac{\infty_0}{\infty_0}=1$, while one gets $\frac21=2$ using the definition of limits.
Nov
22
accepted Complexity of sorting algorthms
Nov
22
asked Complexity of sorting algorthms
Nov
22
answered Solve $f(f(n))=n!$
Nov
13
comment How to convert $\sqrt{\frac{5}{3}}$ to $\frac{\sqrt{15}}{3}$?
@Max ${5\over3}\to{15\over9}$
Nov
13
comment How to convert $\sqrt{\frac{5}{3}}$ to $\frac{\sqrt{15}}{3}$?
BTw, you can use LaTeX makeup by starting with an \$ and ending with another \$, for instance $\sqrt{\frac{5}{3}}$ becomes $\sqrt{\frac{5}{3}}$.
Nov
13
answered How to convert $\sqrt{\frac{5}{3}}$ to $\frac{\sqrt{15}}{3}$?