Axel Vogt

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20 years, 252 days
Munich, Bavaria, Germany

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These are answers submitted by Axel Vogt

find a classical sheet attached

Problem-With-Math-Mo.mws

It works for me, both with Maple 12 and Maple 15 (classical and standard interface):

restart; interface(version);

  Classic Worksheet Interface, Maple 15.00, Windows, Mar 20 2011, Build ID 582305
with(DifferentialGeometry):
DGsetup([x],M):
ExteriorDerivative(x^2);

                                2 x dx
lprint(%);

 _DG([["form", M, 1], [[[1], 2*x]]])

difference quotients ... or a (polynomial?) fit ... or (locally) approximating by splines and differentiating

may be you want to 'filter' outliers first

1. Set it to 1 ... :-) Or end with a double point + use the print command.
Otherwise said: do you really need such?

2. Providing such would probably result in endless support requests.
And without deep experience there is a good chance, that one is not
even aware of side effect and impacts.

For any 2 <= j <= 2011 take the largest of such a factor of j and take the product,
which is to add the exponents.

That way I get k = 2002 by brute counting, using 'ifactors', resulting in a 603 digit
integer for 2^k.

arctanh(x); A:=evalc(%); # decompose in real + imaginary, assuming x is Real
simplify(A, size) assuming 1 <= x;
                                   2
                            (x + 1)
                     1/4 ln(--------) - 1/2 I Pi
                                   2
                            (x - 1)
simplify(A, size) assuming x <= -1;
                                   2
                            (x + 1)
                     1/4 ln(--------) + 1/2 I Pi
                                   2
                            (x - 1)

try to avoid indexed variables (and be aware, that array (lOWER cASE) is outdated)

and use multiplication signs

 

Perhaps the following does what you want

  phi:= (q,x) -> p*q*x;

  phi(1,2);
                                 2 p
  phi(2,2);
                                 4 p

Do You need something like this, ?IntegrationTools[Change],
http://www.maplesoft.com/support/help/Maple/view.aspx?path=IntegrationTools%2fChange

Change(Int(...), x = a + xi, xi)

Numerical I get it as Pi/2 for f(x) = x^2  with 14 places.

Will say more after cleaning up my sheet ... though not analytical.

Edited: err ... typo .. 2/Pi ... see below

Unfortunately you can not write or get -1 < x < 1 (except, that it may look as if it would be so).

However something similar (but not that nice) using ranges, like:

  assume(y=0, x>-1, x<1); getassumptions(x);

                  {x::RealRange(Open(-1), Open(1))}

I guess that leading coefficient = 1 is meant, otherwise assume it

If a is the only zeros of a polynomial in: how can you write it down?
If a,b,c are the only zeros of a polynomial in: how can you write it down?

Recall how the number of zeros of a polynomial and degree are related,
if one works over the complex numbers and then write down the 1st answer

Recall how the complex zeros of a parabola are related - can you express
that by complex conjugation?


Recall how complex zeros of a polynomial are related or formulate a guess
and look it up in your lectures.

For the rest you may remember school and try to use Maple.

In any case: show up what have achieved and done so far before asking.

I have not checked the concurrent status, but Maple provides manuals as pdf,
http://www.maplesoft.com/documentation_center/

Wang Gaoteng, thx. May the very person to be contacted is in the link,
giving Name, email adress and phone number

Edited: deleted the explicit data here given before

Anyway: he does it systematically with that provider, another one
may be the original manufacturer have even more interest in that
than we can imagine

Yes, as I guessed they provide servers, thx.

I do not believe it is a competitor: Maple is not that strong (sorry)
and I have minor reasons to doubt MapleSim is a strongly used
component - it would be much too risky for a competitor (which in
this case is Matlab) to go that way:

S/he would become vulnerable for extorsion attempts (internally)
and no manager would do - not even unofficially ...

What I think is: it is just advertising for plagiaristic products (but
in a quite silly way, may that's why you think about a competitor).
And that those technicians are aware of the weakness of the most
common boards.

Edited: s/he did it at other sites as well, link or here

PS: no need to excuse for China, it is related to the economical
situation of those peoples. The usual attacks are through mails
(at work ~ 98% are killed by our admin's filters and meanwhile
he rejects any mail from CN servers ... but not only from there,
there are lists which can be checked and are updated regularly)

Wang Gaoteng, it is not intended to insult Chinese people

Go into one of the post, like http://www.mapleprimes.com/posts/103581-Hermes-Bags
pick the linked http://www.hermesbags-outlet.org/ and send a ping gives the above IP
and http://www.tiffanyand-cooutlet.com/ gives 95.154.210.219 as another one, which
lead to the Chinese site - however this is only the provider.

But all the pages are Chinese. And refer to www.ptidc.com - providing servers (as far
as I understand a crude translation of that site).

And through whois you can find out more, here

Edited:

www.tiffanyand-cooutlet.com is registered to a person in Shanghai, link
and www.hermesbags-outlet.org to the same person

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