Feanor

Krakow, Poland

Age: 25

Oct
21
asked The connection between roosters and genitalia
Oct
15
awarded Civic Duty
Oct
15
asked How to format bibligraphy when author changes names?
Oct
14
revised Does there exist an $a_0$ such that the sequence $a_{n+1} = 2a_n + 1$ is prime for all $n \ge 0$?
added 427 characters in body
Oct
14
answered Does there exist an $a_0$ such that the sequence $a_{n+1} = 2a_n + 1$ is prime for all $n \ge 0$?
Oct
13
awarded Popular Question
Oct
13
awarded Nice Question
Oct
13
asked Is it unprofessional to use graphics from Wikipedia in a poster?
Oct
11
comment Do better than chance
Perhaps it would be better to say that the opponent draws a line of a given length instead of writing a number. It seems to avoid various loopholes more easily (it is clear that we may assume wlog that all numbers are from (0,1).).
Oct
10
awarded Supporter
Oct
5
comment Calculate the dimension of a space of operators
@LuizCordeiro Thanks! You're right, my bad. You can adapt to use $h^2$ without much trouble.
Oct
5
revised Calculate the dimension of a space of operators
added 124 characters in body
Oct
5
asked Do zodiac signs correlate with personality traits?
Oct
5
comment Fractions and big $O$ notation.
In the comment above, you can in fact take $g(z) = f(z) + O(z^{2n})$, meaning that $g(z) = f(z) + h(z)$ with some $h$ in $O(z^{2n})$.
Oct
5
comment Fractions and big $O$ notation.
I suppose it formally means that if $f(z)$ is $O(z^n)$ then $\frac{1}{1-f(z)} = 1 + g(z)$ where $g(z)$ is some function in $O(z^n)$ (and of course $g$ depends on the choice of $f$).
Oct
5
revised Calculate the dimension of a space of operators
added 19 characters in body
Oct
5
revised Calculate the dimension of a space of operators
added 1135 characters in body
Oct
4
answered Calculate the dimension of a space of operators
Oct
4
revised What are the advantages of using f(x) instead of y=x.
added 266 characters in body
Oct
4
answered What are the advantages of using f(x) instead of y=x.
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