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Nov
25
comment Point me the primordial and intuitive concepts about this operations on physics
what are a, b, and c? It doesn't look like you ever defined them.
Nov
18
comment Fourier-like expansion of a closed curve in 2D
demonstration: youtube.com/watch?v=QVuU2YCwHjw
Nov
18
comment Fourier-like expansion of a closed curve in 2D
We can also think of it as just a usual complex-valued Fourier transform, since complex numbers can represent two dimensions. (I now see that Greg P pointed this out in the comments to the main question.)
Nov
9
awarded  Yearling
Oct
14
answered Fourier transform for dummies
Oct
11
comment What is an example of an application of a higher order derivative ($y^{(n)}$, $n\geq 4$)?
I've heard 4th, 5th, and 6th derivatives called "snap", "crackle", and "pop".
Oct
11
awarded  Nice Question
Sep
15
asked Why can't we interchange differentiation with taking a limit of a series of functions?
Aug
5
awarded  Necromancer
Apr
20
accepted What are the polar coordinates of the origin?
Apr
14
awarded  Nice Question
Apr
14
comment What are the polar coordinates of the origin?
I don't completely understand your answer. Can you give an example of a function discontinuous at the origin as you were mentioning, please?
Apr
14
comment What are the polar coordinates of the origin?
@Qiochu Thanks. How about derivatives?
Apr
13
asked What are the polar coordinates of the origin?
Apr
1
comment How to show $\arcsin{x} = \frac{\pi}{2} + i \ln{(x+\sqrt{x^2-1})}$?
meaningful titles would also be helpful
Apr
1
revised Find max/minima of $x\sqrt{16-x^{2}}$
added 135 characters in body; added 34 characters in body; deleted 165 characters in body
Apr
1
answered Find max/minima of $x\sqrt{16-x^{2}}$
Mar
28
accepted Is there a geometric interpretation of the exponential function of real numbers?
Mar
25
accepted What are the 2125922464947725402112000 symmetries of a Rubik's Cube?
Mar
25
comment What are the 2125922464947725402112000 symmetries of a Rubik's Cube?
@Joriki Thank you, but doesn't that give the wrong number? The size of the Rubik's cube group is 4*10^19 (en.wikipedia.org/wiki/Rubik's_cube_group).