the eve of quantum computing

I'm a dumbass when it comes to quantum stuff. I got pretty high grades at the university just by being more or less fluent with calculating integrals and "solving problems". I know very little about entanglement and I'm still not ready yet to buy the idea of the celebrated EPR "paradox". It is as paradoxic to me as Newtonian gravity changing in time. Using nonrelativistic theory to describe [place your favorite phenomenon here] must not lead to any "paradox" of infinitely fast spreading anything—matter, energy, information... I mean—it does lead to nonsense when you get into causality, but it's no surprise. Ok, enough. Chill, Beavis.

The source of all evil today is again computer-based. Moreover, this stuff is apparently ran by some Python stuff. I noticed you have braces. I have braces too.*

I was trying to write some silly \LaTeX formulas, using the (great, otherwise) plug-in of Inkscape. You can find it in Extensions -> Render -> Math -> pdflatex. If you're into math or physics and know (La)TeX—continue, if not—break; Fine, I'm familiar with the thing since around 2001. The disturbing thing is: inkscape's pdflatex plugin really does result in different formulas, sometimes it exchanges a single letter (or symbol, or index) to something else. The other time—to something other. Not necessarily in math mode. I have no bloody idea h-what in the hw-hell causes that dang rotten behavior. Except for the paranoid-conspirological one—of someone having coded that deliberately. Clicking "Apply" repeatedly I finally got my correct formula. The picture below shows one of the wrong versions; the code is:

$$=—\frac{MR^2}{mr^2 + MR^2} E_k^{(przed)}$$

 

The previous error was to exchange all three squares ("2" 's in superscripts/exponents) to "o" 's. Is Python so clever that if it were "3" 's, it would have replaced it by cubes? "o" is one of the most square-looking letters you can get, topologically. Or, seriously, does this plug-in use some OCR-like thing in between? (This is the kind of errors I would expect of OCR.) If so, why, if you can get vector description of the page (in postscript or eps) out of latex plus dvips. I understand that translating postscript to svg may be hard, but it seems a lot harder for me to imagine that on this level Inkscape's plugin would translate something I expect to appear to some other readable symbol. I wouldn't object at all if all my R's (sic!) got magically translated to a clipart picture of a blin**.

But the non-repeatability haunts me...

* Butthead to Clintons' daughter, Chelsea, as far as I recall (Beavis And Butt-head Do America).

** Yes, I just discovered Boris. Love the guy, no homo.