Ondřej Čertík

I am currently following the Russian (and Czech, Polish, ...) tradition, that when a mathematical formula is broken into multiple lines, the last sign on the line (typically `=` or...

Here is how to do it: http://www.nyu.edu/classes/tuckerman/stat.mech/lectures/lecture_6/node2.html

[WIP] Add multivalued approach

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There are things that are still unclear to me, so they need to be resolved first.

Build a version with mathjax

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Perhaps at /dev-mathjax. The png based image math is hard to read on a high resolution (retina) display.

Here is a great treatment: http://www.continuummechanics.org/cm/materialderivative.html with a worked out example. Do this example in 2D.

Introduce `arg`, `Im`, `Re` (or maybe `im`, `re`). So, in particular, write things like: ``` arg(z) = atan2(im(z), re(z)) ``` and not ``` arg(x+iy) = atan2(y, x) ``` because the...

improve the web page

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Add colors and CSS styling to the front page.

Great table here: http://stevetjoa.com/633/

Reported by Liguang G. Jiao. http://theoretical-physics.net/dev/src/quantum/hf.html#two-particle In the final form of the two-electron potential matrix , I think there is no factor (2L+1). This factor will be eliminated in constructing...

Check Gaunt coefficients and fix if needed

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Reported by László Oroszlány and Laszlo Szunyogh. There is a small mistake (or just rather an inconsistency) in the way you define the c-type Gaunt coefficients in the section about...