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"I would never die for my beliefs because I might be wrong."

-- Bertrand Russell


1d
comment How to calculate power of a number with decimal exponent programatically?
Claude's proposal involves more computation, but has the advantage of needing less storage space as you need very few coefficients compared to values in a log table.
1d
comment How to calculate power of a number with decimal exponent programatically?
@When you say two spline functions, you mean one for the log and one for its inverse, right? I'm willing to write out an answer involving spline functions if nobody does it before me. I'll be AFK for a couple of weeks though.
1d
revised How to calculate power of a number with decimal exponent programatically?
added 1 character in body
1d
comment How to calculate power of a number with decimal exponent programatically?
True that is largely sufficient, I'll modify that!
1d
answered How to calculate power of a number with decimal exponent programatically?
1d
comment How to calculate power of a number with decimal exponent programatically?
However, it could be efficient to use a logarithm table in your computer program if calling values from the memory is "cheaper" than computing. That way, your operations would reduce to multiplications and looking up numbers in tables.
Aug
25
comment Differential equation $x\dfrac{dy}{dx}-xy=y^2$
It is a Bernoulli type equation. Introduce a new variable $z=y^{-1}$ and divide your equation by $y^2$.
Aug
24
comment Vectors-Can anyone explain me the concept of sense in vectors?
@Najib Idrissi: We make this distinction in Dutch (and I suppose German) as well. ("zin" and "richting").
Aug
19
comment Mathematical literature to lose yourself in
Nice book by Edwards, even though it's a secundary source. :)
Aug
17
comment how to find the equation of this set of points?
I'm unconvinced by your arguments without further information about the origin of the data and possible noise on them.
Aug
17
comment how to find the equation of this set of points?
$z=11(x-1)$ and $y=(x+2)\text{mod}10$.
Aug
14
comment Which languages are preferable to study for a mathematician?
Vladimir Arnold, Dmitri Anosov, Eugene Dynkin, Nikolai Efimov, Aleksandr Khinchin, Alexander Friedmann, Aleksandr Lyapunov, Andrey Markov, Ruslan Stratonovich, Yakov Sinai, ...
Aug
14
comment Is tutor essential for success in mathematics?
How much work do you put in? If you don't practice for at least 1 hour everyday, then you don't need a tutor yet, you just need to work harder. Of course, if that is a problem in itself, you might want a tutor to supervise you.
Jul
30
comment How to research a series, when only some elements are available
Have you tried wolframalpha?
Jul
30
comment How to research a series, when only some elements are available
A series is just a sequence of partial sums of another sequence.
Jul
29
awarded  Necromancer
Jul
26
revised Prove that $\small\sin x\sin y\sin(x-y) + \sin y \sin z \sin(y-z) + \sin z \sin x \sin(z-x) + \sin(x-y) \sin(y-z) \sin(z-x) = 0$.
added 13 characters in body; edited title
Jul
18
comment How to determine for which value of an unknown parameter, one eigenvalue is 0?
"Always" was probably putting it too strongly. But I think it's important to guess. Besides, I am under the impression that because of the way I formulated the hint, you think that I first guessed the answer and then motivated my guess. Nothing is farther from the truth, I already had a certain approach in mind before making the guess.
Jul
18
comment How to determine for which value of an unknown parameter, one eigenvalue is 0?
I don't know about you, but I always guess my answers before trying a more deductive approach. There's nothing wrong about guessing, and I think it's no use to give the full answer right now. Besides, hardmath's comment already gave more away even.
Jul
18
answered How to determine for which value of an unknown parameter, one eigenvalue is 0?