Ondrej Certik wrote:
When you created ginac, at around 2001, how much time did you spend coding, to achieve the basic functionality? Couple of weeks? Or months/years? And how many people - 4?
Several months, I suppose. But the very basic functionality that you seem to be discussing was mostly done by Alex Frink alone, at that time. The state was a buggy expand(), no normal(), no indices, no matrices, and a quite useless numeric class. But otherwise, juggling symbols worked fine. I have clear recollection of Jos Vermaseren asking me (just before the release of 0.7.0) how much effort had been put into the code and, then, my answer was three man-years and that was only a slight overestimate. OTOH, at that time we really had no code to look into and learn from. Cheers -richy. -- Richard B. Kreckel <http://www.ginac.de/~kreckel/>