⊆

not this form “⫋”

Hi I 'm using algsubs and i want to substitute p=((m-b)/m) in the

expression

f:=((m-b)/m)^2m+b^2*m so that

i obtain

p^m+b^2*m;

When i use algsubs((m-b)/m)=p,f) it does simplify.

Then i use algsubs(m-b=m*p,f) i got p^m+(1-2*p+p^2)*m

i do not want the last part to be expressed in terms of p.

I will appreciate your help and suggestion.

Thanks

Rajiv
 

Hi!

I have a long formula having 6 variables in it of which 2 can be set 'freely', all others have assumed resctrictions to be real and positive. The formula in overall has to produce a real valued result. Is it possible with Maple to find out a formal expression for the 2 'free' parameters where all the assumptions will be met?

Thank you!

I want to disable automatic simplification for certain operation(s), for example, instead of usual response

How would i plot this surface? 7x+22xy+7y+14xz(sqrt(3))+14yz(sqrt(3))-5z=180

I havn't ever used this program before and my teacher didnt teach us how to use it and wants us to use it.  I tried to plot it but dont understand how to.

Hi there,

B:=Matrix(3,4,[ListTools:-LengthSplit([1,2,3,4,5,6],4)],fill=32);

C:=[seq(i,i=B^%T)];

What's the most efficient way to delete the 'extra' 32s when converting it back?

Thanks.

casper

Hello everybody,

I am happy to join you.

Well... I have an inverted pendulum modelisation, with several theta, theta dot, double dot ...
With Lagrange method, I need to derivate by Theta1(t) dot. However I am unable to do it.

My question is: How to do diff( 5x^2+y,  x^2) ???

The result should be 5.
 

I have I will be able to adapt yours answers to my probelm succesfully.
Many thanks

Ternox
Ps: I use Maple13.

 Download 11608_differential equations.mw
View file details

I use maple sovle an optimality question with hamilton function, but the results are quite different from the given result using matlab. I do not know where I'm wrong ,so can anybody help me ?

Thank you very much!

I am trying to fit the solution from  one nonlinear ode and compare with a set of experimental data. How can I  do this ?.

Thanks in advance... and  any comment will be usefull.

Greetings All

I'm trying to find repeating numbers in the golden mean like 618, 619,645 etc..

I'm getting error message because of syntax and the decimal point how do I take the decimal point out so instead the string is 618 instead .618

How do I get rid of the decimal point in a string?

example

p:=evalf((1+sqrt(5))/2-1,20);

ns:=convert(p,string);

seq(Take(p,i),i=0..20)

SearchText(678,p)

tia sal22

> restart; with(plots); with(plottools);
> mirror := proc (x) options operator, arrow; x^2 end proc; slope := proc (x) options operator, arrow; 2*x end proc; width := .5; height := 1; n := 25;
> mirrorplot := plot(mirror(x), x = -width .. width, y = 0 .. height, axes = NONE, scaling = CONSTRAINED, color = black); display(mirrorplot);

To install in linux do I type:

./installMapleLinux -i console

in the appropriate directory ?

thanks

i am from indonesi..

i using windows vista.. but i can not use maple 9..

what version  compatible for vista???

p := display(seq(cutout(v, 4/5), v = stellate(dodecahedron(), 3)), style = PATCH);

q := display(cutout(icosahedron([0, 0, 0], 2.2), 7/8));

display(p, q, scaling = CONSTRAINED, title = `Nested Polyhedra`)