example.msim

I want to get an adjustable parameter in maplesim. For example, here is a pulse voltage source, i  want to make its amplitude controlled by another voltage output (doesn't exist in this .msim).

hello 
i want to reflect a plot i have j:= plot(y(x),x=0..35) ,y(x) icludes heavside functions around  x=17.5 , for some reason maple using reflect function keeps returning the reflected function in the output and not just the plot. i would like to get rid of it .

reflect(j,[[17.5,0],[17.5,15]])
output : the reflected function of y(x)
the reflected graph. 

thanks for the help 

Hello,

I want to solve three coupled differential equations with initial and boundary conditions numerically and get the plots of solutions.

But I received errors.

Could you please help me to solve the error and get all three plots that I need?

My codes:

restart;

sys := {diff(phi(eta), eta$2) + 5.261282735*f(eta)*diff(phi(eta), eta) - 2.630641368*phi(eta) = 0, 1.059704409*diff(theta(eta), eta$2) + 6.176017503*f(eta)*diff(theta(eta), eta) + 21.03607964*diff(f(eta), eta$2) + 0.5*phi(eta) = 0, diff(f(eta), eta$4) - 1.052256547*diff(f(eta), eta)*diff(f(eta), eta$2) + 1.052256547*f(eta)*diff(f(eta), eta$3) + 5.165076420*diff(theta(eta), eta) + 5.261282735*diff(phi(eta), eta) = 0, eval(diff(phi(eta), eta), {eta = 0}) = 1 + 0.5*eval(diff(f(eta), eta$2), {eta = 0}), eval(diff(phi(eta), eta), {eta = 1}) = 0.5*eval(diff(f(eta), eta$2), {eta = 1}), f(0) = -0.5, f(1) = 0.5, phi(0) = 1, phi(1) = 0, theta(0) = 1, theta(1) = 0};

dsol:=dsolve(sys,numeric);
Error, (in dsolve/numeric/bvp/convertsys) unable to convert to an explicit first-order system
plots[odeplot]((dsol),eta=0..1);
Error, (in plots/odeplot) input is not a valid dsolve/numeric solution

Thank you.

To Maple support,

Why when removing symbol a from these equations makes Maple warning go away? This is from a textbook. Attached worksheet. 

restart;
ode:={diff(x__1(t),t)*sin(x__2(t))=x__4(t)*sin(x__3(t))+x__5(t)*cos(x__3(t)),diff(x__2(t),t)= x__4(t)*cos(x__3(t))-x__5(t)*sin(x__3(t)),diff(x__3(t),t)+diff(x__1(t),t)*cos(x__2(t))= 1,diff(x__4(t),t)-(1-B)*a*x__5(t)= sin(x__2(t))*cos(x__3(t)),diff(x__5(t),t)+(1-B)*a*x__4(t)=sin(x__2(t))*sin(x__3(t))};
dsolve(ode)

restart;
ode:={diff(x__1(t),t)*sin(x__2(t))=x__4(t)*sin(x__3(t))+x__5(t)*cos(x__3(t)),diff(x__2(t),t)= x__4(t)*cos(x__3(t))-x__5(t)*sin(x__3(t)),diff(x__3(t),t)+diff(x__1(t),t)*cos(x__2(t))= 1,diff(x__4(t),t)-(1-B)*x__5(t)= sin(x__2(t))*cos(x__3(t)),diff(x__5(t),t)+(1-B)*a*x__4(t)=sin(x__2(t))*sin(x__3(t))};
dsolve(ode)

worksheet attached also

Download warning_may_10_2022.mw

Hi,

I want to plot a quadric with important elements ( center, Principlal directions, Principal planes..) 

Ideas ? Thanks

Download QuadricQuestion.mw

Anyone keen to spend some time helping me with an error?

I'm getting the error mentioned above with Maple 2022 (but can also be reproduced in 2021).

Originally the error comes from within a company library, but I've managed to reproduce it without the library by merging the library in the workbook.

The error arises during a simple addition / subtraction operation, and I have no clue why.

P.S.: I've also filed a request to Maple support on this one.

CrashTest.zip

Let say, 

A= A1+A2+.....................+An

B=B1+B2+.....................+Bn,

C=C1+C2+.....................+Cn

And all the values of A1 to Cn may be both positive or Negative.

Then, how to program to find the Maximum Value of  (A^2+B^2+C^2+A.B+B.C+C.A)^(1/2).

I should know this by now but its been a long day learning Maple Flow 2022 and my eyes are rolling back in my head and I'm not thinking clearly ... so maybe some kind soul will gentley remind me how to  specify a the units for a number are Radians ...

When I look at the Units Palette in Maple Flow I don't see a unit symbol for radians ... or did I miss it?

Altenately ...

An example for specifying feet ...
type the number
press Ctl+Shift+U
type ft

An example for specifying radians...
enter the number
press Ctl+Shift+U
type what?

I know Maple Flow 2022 uses Radians by default ... but  when I just type a number without specifying units it could be anything.

Thanks for any help.

Question 1: The Common Symbols palette referenced in the the section titled ... "Solution 2 - Use the Palettes" in Online Help HERE ...

Where is the Common Symbols palette in Maple Flow 2022 ... or is it missing?

Question 2: How can I add it if it  is missing as it looks very handy.

Question 3: Can you create custom Palettes and if so how?

Question 4: OT: Any chance of getting a spell checke for Forum Post ? :-)

Thanks for any help.

The long form of ScientificConstants[GetValue] is not working in at least Maple 2021 and Maple 2022

ScientificConstants[GetValue](Constant(g))

This is causing issues for MapleFlow, not being able to call on a constant. 

**edit some of the long forms work - specifically the GetValue does not.  I modified the title to reflect that.**

I know they must be in Maple Flow somewhere but after 45 minutes of looking ... I'm asking ...

Where are the common scientific constants in Maple Flow?

For instance "e" for Euler's number ~2.71828, or "c" the speed of light  in a vacuum ...

Or must I define them myself?

Thanks for any help.

PS - I'm wondering if prior knowlede of the original "Maple Math" program is expected of Maple Flow users?

i have this sequence :f:=n->n/n+1
       

> f1:=seq(f(n), n = 0 .. 10);
                       f1:= 0,1/2,3/4,4/5,5/6,6/7,7/8,8/9,10/11

i want to create these sequences by using f :

1) 0,2/3,4/5,6/7,8/9,...

2)2/3,9/10,16/17,..

3) 1/2^2,3^2/4^2,5^2/6^2,7^2/8^2

4)0,3/4,8/9,24/25,35/36
        can anyone help me ?              

Suppose 

$P(x,y)=\sum_{i+j=0}^N \alpha_{i}x^{i}y^{j}$

is a multivariable polynomial of Nth degree. How may I express the first and second derivatives of $P(x,y)$ through Maplesoft?

Hello Everyone;

Hope you are fine. Solve comand is solving Equation saperately but samultanously. Kindly guide me about this. I have uploaded and pasted the code as well. The last comand (in red color) is not working. I am waiting for the kind response.

Thanks

QuestionNo1.mw

with(GroupTheory);
G := GaloisGroup(x^5 + 20*x + 32, x);

I just can get a result like:

GroupTheory:-GaloisGroup(x^5 + 20*x + 32, x)

But how do I know exactly what group it is? Actually I know the galois group is D₅, But can we use maple to get this information?