Hello,

I have 20 by 20 matrix (with only two symbolic components, say a and b), other entries of the matrix are either populated with zeros or real numbers. I am trying to obtain the inverse.

All the command I have tried returned an error message. In particular M^(-1) yields:

Error, (in radnormal/ifactors) too many levels of recursion.

I would appreciate any suggestion that could solve this issue. Thank you

ps: I am essentially trying to solve Ax=b. The commands within LinearAlgebra all yielded similar error messages.

Hello,

I tried to write a code for CRT-RSA. The encryption is kinda easy and like the normal RSA:

Public key given: (e,N)=(5,851); private key: (d,dcp,dcq,p,q)=(317,29,9,37,23)

with the result:

                      [116, 101, 115, 116]
                       [676, 645, 144, 3]
                      [100, 70, 715, 243]

So, know i tried the following:

that also works pretty fine; dcp and dcq are the CRT-RSA-exponents, and gives:

                        [10, 16, 33, 3]
                          [9, 1, 6, 3]

So now my try for the next step:

but it doesnt work...

the results are:

Why does Maple take the whole vector for y? I dont get it....

Note: if d<sqrt(N), then d=dcq=dcp and the Decryption of normal RSA can be used:

therefore the line:

works as decipher1 already.

So thanks for any help!

Hi, My name is mohammed and I am a P.h.D student . I am a new user with Maple . I had two questions

First one : How can I execute a number of commands by using worksheet or document mode ? can any one  provide me an example?

Second : How can I measure the time for a number of command? can any one provide with syntax of the command?

As maple 18 does not, and I see no information about this topic for 2015 version, besides, I don't have a chance to try the software. So any help would be appreciated.

hello i need plot integrale of siampson thank you

> Simpson := proc(f, a, b, n)
> local h, S1, S2, S, i;
> h := (b-a)/n;
> S1 := 0.0;
> for i from 0 to n-1 do
> S1 := S1 + f(a + (2*i+1)*h);
> end do;
> S2 := 0.0;
> for i from 1 to n-1 do
> S2 := S2 + f(a + (2*i)*h);
> end do;
> S := (h/3) * ( f(a)+f(b) + 4*S1 + 2*S2 );
> return S;
> end proc:
> Digits := 5;

                             Digits := 5

> f := x -> 1/sqrt(39.24*x-44.65*(x*arccos(x)-sqrt(1-x^2)-13.88*(1-x^2)^1.5));

  f := x -> 1/sqrt(39.24 x

                                          2                2 1.5
         - 44.65 (x arccos(x) - sqrt(1 - x ) - 13.88 (1 - x )   ))

> Simpson(f, 0, 1, 100):
>
> p:=int(f(x), x=0..0.1);

                            p := 0.0038931

> w:=int(f(x), x=0.1..0.2);

                            w := 0.0039570

> m:=int(f(x), x=0.2..0.3);

                            m := 0.0040826

> l:=int(f(x), x=0.3..0.4);

                            l := 0.0042836

> kohv:=int(f(x), x=0.4..0.5);

                          kohv := 0.0045860

> q:=int(f(x), x=0.5..0.6);

                            q := 0.0050373

> s:=int(f(x), x=0.6..0.7);

                            s := 0.0057306

> d:=int(f(x), x=0.8..0.9);

                            d := 0.0089874

> f:=int(f(x), x=0.9..1);

                            f := 0.013349

When I take the derivative of abs(x), I use the chain rule and get this

When I ask Maple to differentiate abs(x), I get this:

I read the help file on "signum", and I expected this to work, but it does not.

How can I represent signum in normal calculus syntax when working the derivative of functions involving abs(x)?

Hi All,

I am using pds:-animate to show the results of integration of a two function system, u(x,t) and v (x,t). I would like this command uses two different colors for each line but the command "color=[blue, green]" is not working and both lines have the same color (blue).

Some help?

Thanks a lot,

Javier

Evaluation of Primitive Hydrogenic Coulomb & Exchange Integrals

I would appreciate if someone would check my worksheet wherein these integrals are evaluated applying the method of Eyring, Walter, & Kimball, p 396, Quantum Cemistry, Wiley (1944).

Please write me at cordes@stny.rr.com, and I'll email you a MAPLE worksheet.

Thank you for your consideration.

Dear,

I have this code generating a piecewise function:

> with(CurveFitting);

> points := [[0, 1], [1, 2.5], [3, 2.3], [4.2, 5], [5, 3.5], [5.8, 4.2], [7, 7], [8, 10]];

> splcurve := Spline(points, v);

In this particular case I have seven distinct polynomials. Someone knows how could I get one specific polynomial, for example, the one exactly before v < 4.2? 

In other terms:

I'd like to define a new function, say 'f', that is exactly the polynomial just before v < 4.2 (e.g, something like f:=(splcurve, v < 4.2)). Do exists this possibility? (I have been looking for it elsewhere but without success!!)

Thanks in advance! Best regards!

Hi

I need to display amounts of M2 and 1.15*P2 instead of Notations

TEXT([M2,1.15*P2],'`(M2,1.15P2)`

There is a slight display difference of the code between showstate() and print(). It has to do with '` name `' use where print does not show the outside '' characters.

Here is an example

restart;
showstat(`dsolve`);

and now using print

restart;
interface(verboseproc=3);
print(`dsolve`);

When I used

with(LibraryTools);
Browse();

and looked at the source code there, it matched what showstat(`dsolve`); gave and not the print command. Is there a reason why print does not show all those extra characters exactly as in the source code? It seems a formatting issue, but it is better to be looking at an exact copy of the source code.

Knowing that the Taylor series for cos(x) is:
sum := sum+(-1)^i*x^(2*i)/(2*i)!

How would I write the following Maple code?

Generate an animation sequence showing the Taylor series approximation of cos(x) from N=1..10, where N is the number of terms in the series. Each subsequent frame of the animation should show a more accurate representation of cos(x) than the previous one. Plot the animation from x = -2*Pi .. 2*Pi, y = -5 .. 5

Hi,

     I want to know what K1 and K2 means in the answer after using Euler Lagrange command.

     Thanks in advance.

Under what is new in Maple 2015, it gives lists of commands that has been updated. For example

So suppose one wants to find what changed in the "add" command, how would they find this out? Clicking on the add command shows no indication of what was changed or what options added or modified. For example, with Mathematica, clicking on command, shows the changes in the current releases with different color (light yellow) when clicking on "show changes" (here is an example)

Is  this information available somewhere else? May be using the command line with some option?

Just giving list of commands changed, without any indication of what changed, is not very useful really.