Axel Vogt

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20 years, 255 days
Munich, Bavaria, Germany

MaplePrimes Activity


These are replies submitted by Axel Vogt

Alec,

very nice!

Though I always had problems to make the lib run at my PC ...

Alec,

very nice!

Though I always had problems to make the lib run at my PC ...

If you write CS(n) then Maple considers CS as function and by default it assumes floats. There are 2 ways: either declare variables for CS as integers (i.e. define as as an input) or use CS[1] (have not tested that).

May be quick and dirty is to use an editor to clean up the resulting code you have (do not forget to make a comment on such in your script, you may not remember it in 2 years).

"And I also would like to have the vector CS between the argoment of the fortran function" - I do not understand that. May be to use it as an argument? Then you declare CS as array of length 4 I think and have to use it before in your definitions, like proc(cs::Array(1..4,datatype=float)) end proc;

If you write CS(n) then Maple considers CS as function and by default it assumes floats. There are 2 ways: either declare variables for CS as integers (i.e. define as as an input) or use CS[1] (have not tested that).

May be quick and dirty is to use an editor to clean up the resulting code you have (do not forget to make a comment on such in your script, you may not remember it in 2 years).

"And I also would like to have the vector CS between the argoment of the fortran function" - I do not understand that. May be to use it as an argument? Then you declare CS as array of length 4 I think and have to use it before in your definitions, like proc(cs::Array(1..4,datatype=float)) end proc;

www.cs.cmu.edu/~adamchik/
and the other is one of the authors of a standard reference (in Russian)
I always wanted to have the short form: 
A. P. Prudnikov, Yu. A. Brychkov and O. I. Marichev,
Evaluation of integrals and the mellin transform,
Journal of Mathematical Sciences Volume 54, Number 6
Mai 1991, pp. 1239-1341

Translated from Itogi Nauki i Tekhniki, 
Seriya Matematicheskii Analiz, Vol. 27, 
pp. 3–146, 1989
www.cs.cmu.edu/~adamchik/
and the other is one of the authors of a standard reference (in Russian)
I always wanted to have the short form: 
A. P. Prudnikov, Yu. A. Brychkov and O. I. Marichev,
Evaluation of integrals and the mellin transform,
Journal of Mathematical Sciences Volume 54, Number 6
Mai 1991, pp. 1239-1341

Translated from Itogi Nauki i Tekhniki, 
Seriya Matematicheskii Analiz, Vol. 27, 
pp. 3–146, 1989
it needs
  int(1+(x^2)^(1/3),x); expand(%);
                                     2 (1/3)
                         x + 3/5 x (x )
to get the result
it needs
  int(1+(x^2)^(1/3),x); expand(%);
                                     2 (1/3)
                         x + 3/5 x (x )
to get the result

by 'intuition', i.e. sometimes some trials (with cross checking) are not so bad, since not everything is documented

by 'intuition', i.e. sometimes some trials (with cross checking) are not so bad, since not everything is documented

This is of different quality I would say, since it may be understood as an answer,
where the range of validity is not given explicitly - but can be found easily and
that is a quite common behaviour (however not consistently, as for 'convert' one
usually has to add assumptions, dito for most integrals - or the formula for the
square roots):

  int(x^a,x);
                                (a + 1)
                               x
                               --------
                                a + 1
  discont(%,a);

                                 {-1}

The result of R:= c(op(p)) equals combinat[fibonacci](754966) and
modp(R, 10^6) = 330863, the last 6 decimal places (using an older
version like Maple 11).


Let be p5 = last entry of p, a positive integer of length 78889.

Then

1. The code crashes for me already in the computation f2^2 (just
deactivated the subsequent statements), even if everything is
declared of type 'nonnegint'.

2. The same happens in a fresh classical sheet by merely calling
p5 * p5 or p5^2 by iterated use involving gc().

3. If a result appears, and evalf(%) is used on it, then that
sends Maple to Nirwana.


My OS is a German Win XP SP3 (thus 32 bit) using AMD Athlon 64.
Edited to correct: it is SP2, not SP3

True - but a risky strategy, even if it will work for some years ...
actually it is somewhat idiotic in this case - at least I do not
see, that the company actually has an extra profit in ignoring
demands for a reasonable interface (there is nothing speaking
against a JAVA GUI per se - it is more the anti-productive handling
and the destgusting speed) ... so I guess, it is based on some
ideological/political paradigma, may be even concatenated to some
few persons, unable to revise decision due to market demands (not
talking about some possible technical design errors and the certain
need to let the stuff work with JAVA without being deeply used to
it - I have seen consequences for such in our own shop).

Why risky? There are lots of examples, here are just 2. One is
Software AG (I think they started as spin off from IBM), which
had a superior development system for database application, highly
productive, especially for user dialogs and program maintenance.
They started in times of (IBM based) mainframe computers - and
ignored the UNIX world. Meanwhile they are  negligible at the
market - while formerly even SAP was forced to provide special
versions for this database system. The other is Adidas, they for
a long time ignored the 'younger generation' - and narrowly got
killed by Nike.

Even if these are different as they ignored new demands vs the
complains about new ways they have something in common: there
will be no way back for user who switched.

BTW: searching in historical corners of the www there has been
lot of Maple stuff from INRIA - not much to find todays ...

I did not even receive a notification for SCR - so feel no need to
send one in future, just expect Maple to check this forum. If I had
send it to my distributor I never faced such.


Enough, I feel just as one of a crowd of stupids ...

I sent a short SCR by refering to this thread the same day, that should be enough

If they do not really maintain that and it is the only one I am interested in, then I am only one in a crowd of idiots ... sorry, but that makes me angry (not on you, of course) ... what is a customers treshold?

At least I would expect them to have those things in test routines ... and I would be astonished if such things would never have been seen in beta tests ...

  • is the evaluation of piecewise exited, if the first condition is satisfied
  • or does it run through all the conditions?

(sorry, do not have Maple installed here ...)

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