On Sat, Nov 01, 2014 at 09:22:06PM -0700, Richard Fateman wrote: > Why this is impossible for open-source programs? > > It is not impossible, but I am unaware of (unpaid) maintainers of > open-source programmers carrying pagers on their belts so they can be on > call 24 hours > a day for resolving problems.
Why "unpaid"? > Of course it is possible > to pay people to help with open source code (e.g. some unix supporters). Yes, exactly. > But once you are paying, and not looking at the code yourself, it kind > of changes the equation. Yes, but in first - you can do anything that can do a client of closed-source vendors. And much more (look to the code yourself, pay someone else for support, etc) > Apparently, Spain universities doesn't matter for the > Wolfram Research. > > That sounds reasonable to me. Are you sure that any academic institution does matter for Wolfram? > Or they count "a serious mistake on the > determinant operation" as not important. > > Determinants where the entries are exact integers of extremely many digits > may not be terribly important. What do you think? In first - there is a regression. Second, det's of big matrix - only a symptom of the problem. I don't know what the real problem is and how severe it is. > Worst news - there is an inevitable vendor lock-in. You can't give > your money someone else (but only single "group of experts", mostly > anonymous for you) to fix the issue. > > You can form a union of concerned users, e.g. IBM had SHARE. Is this union can fix closed sources? > While SymPy uses the Karr convention instead: > > Michael Karr? Yes, see the bibliography in the docstring of Sum. > Who named it the Karr convention? Perhaps, we are. Not sure if it's a conventional naming in the literative, can you suggest a better reference here? -- You received this message because you are subscribed to the Google Groups "sympy" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at http://groups.google.com/group/sympy. To view this discussion on the web visit https://groups.google.com/d/msgid/sympy/20141102110611.GA13483%40darkstar.order.hcn-strela.ru. For more options, visit https://groups.google.com/d/optout.
