Why is Maple not calculating 'sqrt' and continuously showing 'Evaluating'?

Download q_sqrt.mw

Hi.

When trying to open my document it says:
''There were problems during the loading process, Your worksheet may become incomplete.''

Would you mind helping me?
I saw some scripts on how to fix it, but simply can't solve it myself.

Regards Samuel

Basismat_2_noter.mw

I am slightly confused as I can't apply the seemingly correct function to a sequence. It seems like modp does not like my inverse. But I am not aware of any other way of finding the modular inverse.  

Download example.mw

Hi, I am completely new to Maple and I keep getting this message:

Error, invalid input: rhs received 19715.18184, which is not valid for its 1st argument, expr

my code is:

sqq:=Vector(n):
for i from 1 by 1 to n do

pom:=eval(sigma[qq],[K=0.5,Fred=0,Phi[a]=0.8,Phi[p]=0.2,camax=300000,Kmin=0.5,co=11230,c11=6120,c12=12710,c21=14.17,c22=6.61,c13=9270,c23=16.16,c14=9270,c24=16.16,g=0.745430443,R=0.00652,H=0.00081,l=2,P=Pload[i],lambda[Q]=lQres1[i], lambda[Z]=lZres1[i]]):

sqq[i]:=rhs(pom):

end do:

I am trying to get a vector sqq solving the equation sigma[qq] using the constants and vectors written there. Can anybody help me please?

how I can plot phi[2] as a contour like attached figure?

tez-1.mw

Download tez-1.mw

Download tez-1.mw

Hi,

I am working on an optimization problem, where i want to Maximize numerically a function (it is too complex to have a deriviatve) here a pseudo code:

Maximize(f(x,y,z), initialpoint = {x=1,y=1,z=1},iterationlimit = 9999);

Now i have a constraint on (x,y,z) where I want the maximum of another function be smaller than a threshold. Problem is, that the constraints function does not put it the corresponding x,y,z tupel and therefore the maximization regarding f does not come to a solution.

Maximize(f(x,y,z), {Maximize(g(x,y,z,f),{0<f<1})[1]<Thres},initialpoint = {x=1,y=1,z=1},iterationlimit = 9999);

Maybe you guys have an idea how to solve this.

Best

How to get same graph from maple with finite difference method for differential equations 

I m new here how to plot this i have seen related posts no where given clear idea for FDM method

plase help me to get the results Thank you

I am creating a Maple document mode worksheet in which I use the Units package. I was doing a calculation and I noticed a discrepancy when I repeated the calculation slightly more manually (but still expecting the same result). 

Here is a link to the worksheet: Units.mw

(Unfortunately, it is hit or miss for me when I try to use the option to show the contents of the worksheet here directly)

Here is a screenshot of the issue

All I am doing in the second calculation is doing some of the unit conversions myself. 

I came across this while solving a chemistry problem, and I know the answer in the book agrees with the second calculation. 

So the question is why doesn't the first calculation, which uses more of Maple's library to do the calculation, agree with the second calculation?

Hi,

So I've just installed the 2022 version of Maple and I wanted to make a new document.

But when I'm trying to make a variable with a subscript that includes a comma, I get wrong output.

For example; I want to make the variable A_b,c as 2D input and then it shows 'A_b,c' as output.

Why are those apostrophs showing up?

Thanks for the help

I’m on a Mac running Ventura 13.4.1 and Maple 2022. 

My plots now have axes and labels that are tiny. It seems like that possibly happened with one of the recent OS updates
Below is a graph of
with(plots): implicitplot3d(3x+2y+4z=2);

It renders the same if I use 
implicitplot3d(3x+2y+4z=2, axesfont=["TimesNewRoman", 12], labelfont = ["TimesNewRoman", 12]);

I can to change the 12 to much larger to see them. But I never used to have to do that before. Does anyone know if this is an OS issue? Is there a global setting I can change? 

 For the command LieAlgebras[RootSpaceDecomposition] I don't understand what the command return, I read the help and see the examples but still not understanding.

for example it returns:

RSD := RootSpaceDecomposition(CSA);

RSD := table([[-2, -1] = E31, [2, 1] = E13, [1, 2] = E23, [1, -1] = E12, [-1, 1] = E21, [-1, -2] = E32])

I don't understand what means [-2, -1] even they said that is the root but I know that a root is in h* so it must be only a number not a vector.

This isn't particularly complicated. Varying the span generates graphs that are smooth or have an obvious bug. Not sure why.

This also happens if you vary the C_I_CentLim or the C_Inventory. I created this example so it is clearly happening.
The graph gets a sharp jag down, then returns to normal.

Something weird with density of points? I played with it for hours and can't get it to go away.
=============================================
restart;
L := 0;
C_Inventory := 1500;
C_I_CentLim := 0.001;
C_I_StartLim := C_Inventory*C_I_CentLim;
C_InV := Matrix(1000, 3);  # This is so you  can see values created only bobble slightly where the graph has a giant deviation.
iCounter := 0;
P_ScLdt := proc(t) local x, k; global L, C_Inventory, iCounter, C_InV; x := 0; k := 0.08; iCounter := iCounter + 1; L := C_Inventory*C_I_CentLim; x := 4.8 + L/(1 + exp(-k*(t - 2060))) + 0.050; C_InV[iCounter, 1] := L; C_InV[iCounter, 2] := C_Inventory; C_InV[iCounter, 3] := x; if 0 < x then C_Inventory := C_Inventory - x; return x; else return 0; end if; end proc;

# Show results 1800-2100  Problem.
pP_ScLdt := plot('P_ScLdt'(x), x = 1800 .. 2100, linestyle = dash, color = red, thickness = 3, axis = [gridlines = [colour = black, majorlines = 2]], legend = "Pg");

# Re-initialize.
L := 0;
C_Inventory := 1500;
C_I_CentLim := 0.001;
C_I_StartLim := C_Inventory*C_I_CentLim;
C_InV := Matrix(1000, 3);
iCounter := 0;
# Show  that problem happens with a little shorter span
pP_ScLdt := plot('P_ScLdt'(x), x = 1850 .. 2100, linestyle = solid, color = black, thickness = 1, axis = [gridlines = [colour = black, majorlines = 2]], legend = "Pg");

# Re-initialize
L := 0;
C_Inventory := 1500;
C_I_CentLim := 0.001;
C_I_StartLim := C_Inventory*C_I_CentLim;
C_InV := Matrix(1000, 3);
iCounter := 0;
# Show problem goes away with a different interval 1900-2200
pP_ScLdt := plot('P_ScLdt'(x), x = 1900 .. 2200, linestyle = dash, color = blue, thickness = 3, axis = [gridlines = [colour = black, majorlines = 2]], legend = "Pg");

# Re-initialize
L := 0;
C_Inventory := 1500;
C_I_CentLim := 0.001;
C_I_StartLim := C_Inventory*C_I_CentLim;
C_InV := Matrix(1000, 3);
iCounter := 0;
# Enlarge the working interval of 1900-2200 to 1900-2300 and the problem returns, in a different place.
pP_ScLdt := plot('P_ScLdt'(x), x = 1900 .. 2300, linestyle = dash, color = blue, thickness = 3, axis = [gridlines = [colour = black, majorlines = 2]], legend = "Pg");

# Re-initialize
L := 0;
C_Inventory := 2000;
C_I_CentLim := 0.001;
C_I_StartLim := C_Inventory*C_I_CentLim;
C_InV := Matrix(1000, 3);
iCounter := 0;

# Enlarge the interval and it causes a larger set of jaggie deviations.
pP_ScLdt := plot('P_ScLdt'(x), x = 1800 .. 2800, linestyle = solid, color = blue, thickness = 1, axis = [gridlines = [colour = black, majorlines = 2]], legend = "Pg");

hello, mybe someone can help me to make an estimation parameter use data to diferential equation system. I had have made the maple sheet but there are some error, thank you very much. data_fitting_.mw

MAPLE.mw

Download MAPLE.mw

Hi,

I think the title of the question speaks for itself.

But, to be more precise, here's an example with a real-valued function which, when it has two real numbers as input, gives the ratio of the first number to the second number, but if it has three real numbers as input, it returns the sum of the first number with the product of the next two numbers...

Thanks.