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Hello everybody,

 

I'm quite new to Maple. I need to get the relative values for two variables in an inequality. I thought using Maple would be an easy way but instead I'm getting confused.

I tried this command:

solve((2+l^2-4*l)*n^2-(4-4*l)*n+2>0,n);

and the output I get is just the error about lost solutions.

Is there anything wrong with my command?

 

Any help is appreciated and many thanks in advance,

Dear Maple Prime,

 

I'd like to know if when I use the Solve command, I can restrict the solutions to REAL solutions?

 

THanks,

 

Christian

What I mean is for example, the series

# 1-t+t^2-t^3+...;         -----------------------(1)

equals to

1/(1+t); # modulus of t < 1 --------------(2)

so given the terms in (1) above could maple deduce (2)  ?

 

Document Blocks

I have been trying to follow the steps in the help page for Document Blocks. The instruction to select all the lines and then select View->Inline Document Output. Problem is, that it simply refuses to work at this point. Any clues, please ?

Hello mathematicians :)

I have a problem finding the inverse of the following 12x12 matrix:

C:=Matrix([

[ 1, x1, y1,    x1^2, x1*y1, y1^2,      x1^3,    x1^2*y1, x1*y1^2,   y1^3,      x1^3*y1,   x1*y1^3],
[ 0,  0,  1,       0,    x1, 2*y1,         0,      ...

> solve({G*{(1-v)*s1+v}+H*{(1-v)*s2+v} = n1, G*{(1-v)*s1*w^s1+v*w^s1}/w+H*{(1-v)*s2*w^s2+v*w^s2}/w = -p*(1+v)*(1-2*v)/(e*w^beta)+n2}, [G, H]);
print(`output redirected...`); # input placeholder
Warning, solutions may have been lost
[]

Does maple use the acml,

it is almost that in every version the Intel MKL is the latest

I wonder how do I show with Maple that for

p:=(x,a,b)->a*(a+x*b)^(x-1)*(exp(-(a+x*b)))/(x!);

the series

sum(p(x,a,b),x=0..infinity) assuming a>0,b<1,b>-1

converges to 1. I also tried

sum(a*(a+x*b)^(x-1)*(exp(-(a+x*b)))/(x!), x=m..infinity) assuming a>0,b<1,b>-1,a+m*b<=0

but all to no avail. For b=0, Maple shows the series converges and we have the Poisson distribution. For b in (-1,1), the (discrete) density...

I want to plot three cumulative normal distributions. I know the parameters mu and sigma from each function. If I give the commands 

f:=int(1/sqrt(2*Pi)/sigma*exp(-(x-mu)^2/2/sigma^2),x);             1
plot(subs({mu=0,sigma=1},(1)),x=-4..8);
 

I get a 2d-plot. But I want to illustrate, how functions can be moved in space. In the 2d-plot, the x-axis illustrates the values of the random variable and the y-axis illustrates...

I wrote some code involving chrem that broke in a recent version.

> y := Vector([0]):
> yp := Vector([1]):
> trace(chrem);
> chrem( [y, yp], [1,3] );
{--> enter chrem, args = [Vector(1, [...], datatype = anything), Vector(1, [...], 
datatype = anything)], [1, 3]
n := 2

v, m := [0], 1

v := 0

On a similar note but continuing a Roots discussion

Roots(2^(cos(x))-5)

produces the error    Warning, the expression has an infinity of potential roots, but none could be confirmed  However we know there are none (I'm pretty sure) and Maple should return, No roots exist from this expression. 

Although Maple correctly returns an empty list using a range or numeric option. 

I am trying to find a way to programmatically start a Maple animation, specifically after a custom button has been pressed.

Equivalently, I would be happy with being able to pass an option do "display" function, so that when I use it to create an animation, it is running from the moment it appears on the screen.

Any hints will be greatly appreciated.

If I have the following expression 

K:=(j)->j  is an expression where j an index run from 1 to 10

Now, I want to fill a row matrix with this expression as follows

A := Matrix(1, 10, K)

I think this is true where the result is [ 1  2  3  4  ..... 10]

but this is not  true in maple

the result is     [1  1  1  1 ..... 1] 

can any one tell what is the truth.

HI DR. Kamel Boughrara,

I am trying to understand the analytical magnetic field modeling of slotless PMSM, but it would be of great help if you could define the variables, like  mp =3,  QS=24, ap=1, p=2, q= QS/2*p*mp, tt, Qt and pls also iMX=10,  I am attaching the code for your kind answer.

Thanks

A.Q 

 

 

codetounderstand.mw

Let a function f be defined on the set of all real numbers and satisfy the relation
f(x+y)=f(x)+f(y)+80*x*y. How to find f(4/5) with Maple if f(1/4)=2?

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