Axel Vogt

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20 years, 229 days
Munich, Bavaria, Germany

MaplePrimes Activity


These are answers submitted by Axel Vogt

for me it works in both interfaces - may be you have something in your ini file?

Sum((5/2+2310*n^5+5775*n^4+5019*n^3+(3507/2)*n^2+(409/2)*n)/(27720*n^7+97020*n^6+132300*n^5+88200*n^4+29400*n^3+4410*n^2+210*n), n = 1 .. n);
 value(%);
 factor(%);
 combine(%); simplify(%, size);# allvalues(%);
 #expand(%);
 factor(%);

isnt there something from Bailey, Borwein & Plouffe?

For me as well? Or do I need to have purchased MapleSim?

Is that really the way how Math is learned to day? I would find that frustrating, it like in School, mechanical - but having a CAS at hand (sorry, but do know much about the 'system' in foreign countries) ...

.

Though I understand your desire (more or less) there is no "standard"
for transforms or special functions, not even for Fourier transform.

And not sure whether someone has 'Bracewell (p335)' it would be best
to write down his definition for the transform, dito for the Bessel
function he uses (it is quite often, that different notations and
factors for scaling or norming are used by different authors).

If you have them both and compare that to Maple's convention then you
can simply translate as shown by Alex.

export as html gives me good pictures as *.gifs (working with the Reasonable Interface), it may depend on MS Word how they are imported

This way you divide numerical by zero, exp( verysmall*x ) - 1 ~ 0.


  params:=[c=2.998*10^8,k=1.381*10^(23),h=6.626*10^(-34),t=4500];

  (h/k/t*x); eval(%, params);
  eval(%, x=1)..eval(%, x=100);;

                              -59                       -57
           0.10662161074906 10    .. 0.10662161074906 10

Now xi = h/k/t*x is very small, so you can use a Taylor series,
even with Digits:=14:

  # version 1
  exp(xi)-1; series(%, xi=0,3);
  convert(%,polynom);
  E1:=unapply(%,xi);

                                              2
                       E1 := xi -> xi + 1/2 xi

  (8*Pi*h/(c^3))*(x^3/E1(h*x/(k*t)));
  P1:=eval(%, params);
  plot(P1, x=1 ..100);


  # version 2
  1/(exp(xi)-1); series(%, xi=0,6);
  convert(%,polynom);
  E2:=unapply(%,xi);

                          1                             3
             E2 := xi -> ---- - 1/2 + 1/12 xi - 1/720 xi
                          xi

  (8*Pi*h/(c^3))*(x^3*E2(h*x/(k*t)));
  P2:=eval(%, params);
  plot(P2, x=1 ..100);

For an experienced coder it will be simple, if your specifications are correct (and that is, what he has to work out with you)

perhaps none: MS Access depends on versions (and may be has passwords). The main point however: it stands not for a table, but for a relational database. So may ask the developpers to write a makro for exporting data to a flat file, to be read from Maple. For triggering that you may look up the MS manual to start / stop Access with a flag by a command line command to be sent by Maple.

.

Laurie Anderson (not sure about spelling) had a song and said "there is no Captian"

I suggest you for the most lame homework cry of the last quaters and: "there will be no answer"

try the most simple case: a line in the plane.

- how many points do you need to determine it
- what can you say if you have only 1 point
- how would you solve that instead of your original exercise

then try to start over ... avoid Maple as far as possible for all that
until you got the principle

what have you done so far (by paper and pencil?) to set up equations?

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