differential equation...

i want to solve this equation,

y''(x)=5*exp(-10/y'(x)) on ]0,15[ with y(0)=0,y(15)=2

can any one help me ? thank you

Rotate 2-D plot around x-axis...

Hello

I have question. How can I rotate this 2-D plot and create 3-D plot?

plot(exp(-(x-3)^2*cos(4*(x-3))),x=1..5)

Thank you.

how do I remove the error "initial Newton iteratio...

Respected member!

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can you color a certain part of a 2d plot, for ins...

Dear community,

I'm new to maple and was wondering if you could help me out.

I have this curve where I want to make a line that goes from x=0.5 up to its value on the curve in this case 1.60 and then all the way to the y-axis so there is an area under the curve which I can color if that's even possible?

I have the following in maple:

k := 2.5;
2.5
Ca0 := 1;
1
v := 20;
20
Ca := Ca0*(1-x);
1 - x
Fa0 := Ca0*v;
20
Cb := Ca0*x;
x
ra := k*Ca*Cb;
2.5 (1 - x) x
plot(1/ra, x = 0 .. 1);

Best Regards

How to integrate a procedure properly?...

I recently encontered a very strange result.

Lets define the procedure:

```Fg := proc(x0,y0)
if (x0>=0)and(x0<=3) and (y0<=x0+2) and (y0>=x0-1) and (y0>=0) and (y0 <=3) then
return y0*(3-y0)*x0*(3-x0)*(x0+2-y0)*(y0-x0+1);
else
return 0;
end if:
end proc:```

The plot looks like needed:

`plot3d('Fg'(x,y), x=0..3, y=0..3);`

But integration returns weird result:

`evalf(Int('Fg'(x,y), [x=0..1, y=0..2.1]));`

7.888753239

`evalf(Int('Fg'(x,y), [x=0..1, y=0..2.2]));`

Error, (in evalf/int) when calling 'Fg'. Received: 'cannot determine if this expression is true or false: 0 <= x and x <= 3 and y <= x+2 and x-1 <= y and 0 <= y and y <= 3'

Error, (in PDEtools/pdsolve) invalid input: `pdsol...

hi...i have a problem with pdsolve this equations?

thanks

mt.mw

Maple Worksheet - Error

Failed to load the worksheet /maplenet/convert/mt.mw .

How to use substition with functions?...

Consider substutition with use of a function:

`subs(F(x,y)=f(x)+g(y), F(x,y));`

As expected, Maple returns the proper answer:

f(x)+g(y)

But

`subs(F(x,y)=f(x)+g(y), F(x,x));`

returns

F(x,x)

How to force Maple recognize F as a function, in order to obtain

f(x)+g(x)

in return?

The functions algsubs, applyrule work in the same way.

How to hide the commands in a quiz created with Ma...

Hi, I try to create quizes in Maple 2016, but I don't know how to hide the Maple commands. Is it possible?

I'd like my students to see only

when they access the quiz. Any help will be highly appreciated. Thank you.

Minimum cost of a TRP...

Experts.

I'm trying to solve a Truck Routing Problem. I set in up in Maple and Excel, but I get a smaller minimum in the spreadsheet, than in Maple. Its like as if I havn't generated enough possible routes, even though i feel i've done an exaustive search. I realise the distance matrix violates the triangle inequality.  Any suggestions....

TRP_14x3.mw

How to convert an imported data to Vector?...

A very big data was imported by me through

```data := Import("http://fs3.fex.net/get/245716150875/11071260/data.txt");
"3.0994584798345
22.889020258043
....

26.082759642081
42.911810680717
6.4578968130322"

```

I need to convert it to Vector/Array. Now its type is "string":

```whattype(data);
string
```

Here is my unsuccessful attempt:

```convert(data,Vector);
Error, invalid input: `convert/Vector` expects its 1st argument, V, to be of type {Array, Matrix, Vector, array, sequential}, but received 3.0994584798345
22.889020258043
....```

data.mw

Simplified form of equation/function ...

I am new user of Maple, couldn’t find solution for my problem in the last two days therefore I would like to turn to your community with my question. I am trying to replicate the calculations from a study to be sure about my understanding of the topic.

I cannot simplify the final equation even though the variables with their values are given. A screenshot and the file are attached, that might make easier to understand my problem.

I know what the solution should be. I cannot simplify/replace the values in the equation to get a simpler form; [(D0 - d1c - R)/ 2d1)]+c

Thank you if you have the time to help.

Joint_Pricing_Sol_.maple

Solving equation with two reststricted variables...

How do I check if there are any solutions to this equation:
1/(u+v)^2+4*u*v-1=0
where both u and v are real numbers larger than 0.

Select remove in partitition...

Hi

How can I remove a subset containing a number from a partition?

eg S := [seq(2..5)]

P:=combinat:-setpartition(S, 2);

[[[2, 3], [4, 5]], [[2, 4], [3, 5]], [[2, 5], [3, 4]]]

I want to remove any partition involving 5

leaving

[[[2, 3]], [[2, 4]], [[3, 4]]]

i tried

remove(has,P,5)

Incomplete worksheet...

I'm studying for an exam and earlier today I was working in my Maple sheet. I saved it as usual and no .bak file was in the directory afterwards. When I now later in the day tried to open it, I got the pop up message:
"There were problems during the loading process. your worksheet may be incomplete" and half of the content is missing.

I've searched on google and tried to solve it myself, unfortunately without any luck.

I would really appreciate any help.

Best regards

Maybe a limitation to DocumentTools :-RunWorkshee...

Hi everybody,

I am used to using  the DocumentTools :-RunWorksheet command and I am confronted with the following problem :

• My worksheet is deemed to generate a plot in a png file
> plotsetup(png, plotoutput=MyFile, …)
> plot( …)

But MyFile is not created

• Thinking that the mw file launched by  DocumentTools :-RunWorksheet is seen as a procedure, I have thought that print(plot(…)) would fix the issue.
Unfortunately the png file is still not created (same behavior with a jpeg file)

I know that  DocumentTools :-RunWorksheet is “experimental” but I wonder if I am doing something wrong or if DocumentTools :-RunWorksheet simply does not support plots ?