Re: Mathematica on linux help and Mathematica returns wrong integral result

*To*: mathgroup at smc.vnet.net*Subject*: [mg19446] Re: Mathematica on linux help and Mathematica returns wrong integral result*From*: Phil Mendelsohn <mend0070 at tc.umn.edu>*Date*: Wed, 25 Aug 1999 01:25:15 -0400*Organization*: University of Minnesota, Twin Cities Campus*References*: <7ptalj$lit@smc.vnet.net>*Sender*: owner-wri-mathgroup at wolfram.com

As far as your cursor problems go, you should try checking what your Mod2 button is. Mod1 is probably the Alt key. Mod2 is probably NumLock -- and it affects this. It took me a while to realize that was the reason that sometimes I could get the menus to pull down using the right mouse button, but not always. I also had some trouble with selection. You can change this if you like; the docs say to use xmodmap outside Mathematica. As far as the wrong integral, I'll leave that to someone who has a better idea, but I suspect that your answer is going to be "if you enter it in [x] form, it will work" or "if you tell it to Evaluate part first, the answer will be correct." --Cheers, Phil Mendelsohn psalzman at landau.ucdavis.edu wrote: > i have Mathematica for students, version 3.1 running on suse linux 6.1 with > enlightenment (no gnome or kde). > > very often when i want to click on something, the cursor (which is normally > a pointer) becomes a hand and won't allow me to position it where i want. > > for instance, i'm looking at the "help browser" right now, and i looked at > "factor" because i want to find out how to factor a pi/2 in front of an > expression. it says "See also FactorTerms" as a blue hyperlink. under > windows, when i click on that, the help browser would display the help for > FactorTerms. here, when i go to click on it, the cursor becomes a hand and > won't let me click on it. > > this is kind of annoying -- can someone tell me how to avoid this? at the > very least, i want to be able to click on hyperlink help topics that appear > in the help browser. > > =========================================================================== > wrong result > > i've definitely confirmed that Mathematica definitely gives a wrong result for > an integral. i've have an integral which contains a product of 3 > bessel function of half order. i expressed this integral in 3 ways -- > converting no bessel functions as sin x/x, converting 1 bessel function as > sin[x]/x, converting 2 besselfunctions as sin x/x and converting all 3 as > sin x/ x. the expressions are all equal, and the result that Mathematica gives is > *almost* correct.