Feanor

Krakow, Poland

Age: 25

1d
awarded Nice Question
Dec
12
asked Orbit closure is uncountable, unless there is a periodic element.
Nov
16
comment Answering a (Seemingly) Unanswerable Question
@SteveJessop: The way I see it, "unanswered list" is the place where one would look for a question to answer. Since known open problems are not likely to be solved here, I don't think there is much use in having problems like that on the list.
Nov
10
accepted Global minimum of a function - is this condition sufficient?
Nov
10
accepted Can we effectively solve a system of polynomial equations (numerically).
Nov
10
accepted Compactness principle via model theory.
Nov
10
accepted How to check if a sequence is random?
Nov
10
accepted How does one explain basic probability theory to a layman?
Nov
10
accepted Given $d$, for how many $m$'s is $d$ a quadratic residue mod $m$?
Nov
9
awarded Civic Duty
Nov
7
comment Word for two collections that do not have any elements in common
It may be worht pointing out that many mathematicians use "orthogonal" as a synonym for "unrelated", often in a tounge-in-cheek manner. (I can't say for the rest of the population). This being said, I would imagine two "orthogonal" things to have as much in common as two random things. Orthogonal lines meet in one point, not zero.
Nov
7
answered Answering a (Seemingly) Unanswerable Question
Nov
2
awarded Curious
Nov
1
awarded Commentator
Nov
1
comment How to politely begin an email to a professor and a doctor?
@ArmenԾիրունյան: Thank you for the comment. I meant it as a question about the rules for writing letters, and hence about the language (or maybe culture) rather than psychology.
Nov
1
asked How to politely begin an email to a professor and a doctor?
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
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