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  • 21 votes cast
Dec
26
comment How to divide natural number N into M nearly equal summands?
Such easy, thanks. I understand I made some obvious mistakes drawing by eye...
Dec
26
comment How to divide natural number N into M nearly equal summands?
Wait me thinking :)
Dec
26
comment How to divide natural number N into M nearly equal summands?
I think your sequence will not touch the line in the middle? I would like to interchange summands so that they tend to be as close to the ratio, as possible.
Nov
23
comment Is it possible to prove that some point belongs to Mandelbrot set? Is this an example of Gödel's theorem?
In principle, can it be known, that Mandelbrot set is not computable? If "yes", then will it represent a sample of Goedel term?
Nov
23
comment Is it possible to prove that some point belongs to Mandelbrot set? Is this an example of Gödel's theorem?
We can limit to rational arithmetic.
Nov
12
comment Homogeneous matrix to represent rotation out of plane?
Is there a formula for Euler angles?
Jul
29
comment How to make ANY function to repeat periodically?
@MJD I was thinking about this way. But this way I cut all values outside period, i.e. if function is not localized, that periodic version will notably differ.
Jul
5
comment Is it possible to reverse probabilistic automaton?
Aren't both sides identical up to index names?
Jul
5
comment Is it possible to reverse probabilistic automaton?
Distribution is one, but it includes several successor states, i.e. $P_{ij}$ can be greater than zero for more than one $j$-s
Jul
5
comment Is it possible to reverse probabilistic automaton?
Sorry not familar with Segala and Lynch :shame: I mean just state machine which changes it's state according to probability transition matrix.
Jun
14
comment Understanding perspective transform matrix elements interpretation
I can use lower right element as 1 too. This is probably also perspective transform, but I can't understand it too.
Jun
14
comment Understanding perspective transform matrix elements interpretation
See my update. 3x3 matrix gives the same result (I think) as 4x4 matrix with 3rd row/column excluded / turned to zero. My question is more general.
Jun
14
comment Understanding perspective transform matrix elements interpretation
I am using 4x4 matrices.
Jun
10
comment How to remove high frequncies having fft?
But where is it? High frequencies are located in the center of DFT spectrum, but I have zero there. Look at the first plot: no peaks at the center!
Jun
9
comment How to remove high frequncies having fft?
finally I understood your point about negative frequencies: first DFT element is zero frequency, subsequent ones are positive frequencies, second half contains negative frequencies (in negative order). But your point about discontinuity seems to me as being wrong. Can you strengthen it please?
Jun
9
comment Edge effects in 2D fourier transform?
I did not zero, I did some filtering with fourier3(1+padding1:end-padding1,1+padding2:end-padding2,:)=0;, i.e. turned to zero some part of spectrum
Jun
9
comment Edge effects in 2D fourier transform?
Please any expected my errors! Yes, I did fft2, see my code update.
Jun
9
comment How to remove high frequncies having fft?
P.S. So how to zero only high frequencies?
Jun
9
comment How to remove high frequncies having fft?
Your link looks broken
Mar
20
comment What is the sense of bottom row of affine transform matrix?
What if I put non-zeros and non-ones there. This is the question.