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age 25
visits member for 4 years, 2 months
seen 21 hours ago

Jul
3
comment $i^2$ why is it $-1$ when you can show it is $1$?
See: en.wikipedia.org/wiki/… , where there are other false proofs of this kind.
Jun
27
comment Ways to evaluate $\int \sec \theta \, \mathrm d \theta$
@Mariano: I'm quite late to the party here, but would you care to elaborate? I'm not quite sure I understand what you mean by "rational parametrization of the unit circle" and how it's related to Weierstrass substitution.
Jun
26
comment Reference request: is mathematics discovered or created?
@Theo: Thank you! No, I can't see deleted answers. I will surely check it out. The encyclopedia entry looks very interesting: I don't know if it deals with the subject at hand, but in any case it seems it will be a very illuminating reading.
Jun
26
comment Reference request: is mathematics discovered or created?
Thank you all for your research on such an informative answer!
Jun
26
comment Why isn't the perfect closure separable?
I had forgotten to bring the answer here! Better late than never...
Jun
26
accepted Why isn't the perfect closure separable?
Jun
26
answered Why isn't the perfect closure separable?
Jun
26
comment Reference request: is mathematics discovered or created?
@Theo: thank you for your confidence.
Jun
26
comment Reference request: is mathematics discovered or created?
@Pete: But Pete, I'm not asking for help in writing the text, not at all. I'm just asking for useful references. What I'm supposed to compose will not be comprised merely of a bibliography. I don't see how this is unethical, if that's what you're implying.
Jun
25
comment Reference request: is mathematics discovered or created?
...proper "philosophy of math/science" or "epistemology" course available. So if I have to do some work for a course that doesn't interest me much and is just compulsory, I might as well do it in something that interests me, is what I think.
Jun
25
comment Reference request: is mathematics discovered or created?
@Pete: it is not a research paper what I have to write (if I understand well what you mean by "research paper"), just a 10-15 pages survey on some topic of interest. To be honest, the course is not on philosophy of science but rather on "university, science and society". Some of the early lectures were on the history of science and some epistemology; based on that I want to write something related to that part of the course, and not the more socially-oriented part which is not of great interest to me. In fact, I've matriculated to this course only because it is compulsory and there is no...
Jun
25
comment Reference request: is mathematics discovered or created?
@user6312: thank you. Also, lol @ "Bruce"!
Jun
25
comment Reference request: is mathematics discovered or created?
I fixed your link. I know of this article and have read it before (and liked it a lot). It is of course related. Thank you.
Jun
25
revised Reference request: is mathematics discovered or created?
fixed link & spelling
Jun
25
asked Reference request: is mathematics discovered or created?
Jun
22
comment Reference for Algebraic Geometry
@Mariano: Oh yes, that's true, I had forgotten about that one. It's the one a teacher here recently taught a course with (sadly I couldn't take it) on the subject, and when I leafed through it it looked quite wonderful.
Jun
22
answered Reference for Algebraic Geometry
Jun
18
comment if $s \implies \lnot w$, does $\lnot s \implies w$?
If it is sunny, it doesn't rain. But if it doesn't rain, it doesn't mean it has to be sunny. --Edit: ah, I hadn't seen Didier's answer below ;P
Jun
15
comment Why is an empty function considered a function?
...so, the initial element in Set (--see en.wikipedia.org/wiki/Initial_and_terminal_objects)
Jun
15
comment Equivalent conditions for a preabelian category to be abelian
@Theo: Sorry, I hadn't had time to finish checking the argument. I did now, it's perfect. Thank you once again, you've been of huge help!