Download Fuly_bonded_updated.mw

A line is deternined on one side by 16*x-2*y-11*z=0, 14*x-y-10*z=3 and on the other by (x-2)/3=(y-5)/2=(z-2)/4. Are they equivalent  ?  Thank you. 

Latest updates of Physics package (problem start with version cca 1020) is not announced at Maple cloud user window (see attacehd snapshot). The same problem occur on Windows and Linux platform!

I need to express a function after factoring out a variable. How do I do this?

L/(z*sqrt(z^2 + L^2)

Need to write in terms of L/z or z/L.

Hi,

I have had trouble with a  .mw worksheet..which I will attach.(I am using Maple 2021)..This is second time it got corrupted..I used the

"CompleteMiniCourseComputerAlgebraPhysics" and copy parts to worksheets so I can work the problems and I do 

Alot of markups and highlighting as well as add coments a copy as Text from help on certain commands..

I read some other posts that discuss corrupt file thats use XML I think in the worksheet....I checked this in the area I was working and did not find anything (I completed about half of the course saving as I went and had no problems)....so any guidance would be appreciated..

ThanksMyMinitCourseComputerAlgebraForPhysicsPart2_-_Copy_-_Copy.zipMyMinitCourseComputerAlgebraForPhysicsPart2_-_Copy_-_Copy.zip

Frank McFee

I have attached some screenshots of the display in Maple 2021 which seem to appear after Maple has been up for an extended period of time (seemingly 3+ hours). The odd characters are not present when the tabs are initially opened, and the problem disappears for awhile after a restart.  Generally, I have not noticed a similar problem in Maple 2020.  However, the corruption of the output affects not only user created worksheets, but also help pages and examples opened from help as can be seen in the image below.

FYI I am using M2021 on an HP Omen gaming laptop that is several years old, but has been updated (drivers and windows)  as they become available.

I have made a procedure named Eratosthenes that will return a sequence of all the primes less than some given number N which must be a positive integer. However, I couldn't figure out the error but still, the code is not working either. Can anyone please go through my code to let me know if I have a mistake? Thanks.

Download issue.mwissue.mw

I have been trying to solve the following question using Maple for quite some time but couldn't do it. Any guide will be highly appreciated. 

P.S: I have just started learning it by myself in the last few days. I have been following An Introduction to Modern Mathematical Computing: With Maple. If you could suggest a more useful text, that would be helpful.

Please find the question below.

Warning: Solutions may have been lost;  Pleas help, i have uploaded .mw file

How I have used maple 2018, 2019 and 2020. I am now trying to switch to 2021, however the resolution is irritating. The resoluion in the palettes tab is bad and is especially bad for the "popup suggestion window" when you press escape on like "sum" or "e". I have tried searching on google to fix it but have not been able to find any help. Using windows 10

The pictures attached shows the resolution problem.

I know it is a small issue, but it annoys me a lot. So any suggestions to what I could do?

Where should I put the activation code ! 

Dear forum,

my name is Klaus, I am a former mathcad-user and new to maple. I try to get some sheets converted and found a maple-behaviour I don't understand.

I made up a simple function with an if statement. When I try different inputs by hand, I get correct results.
But if I try to plot it, I get the message that the if-statement does not work.

My question : How can I solve this ? And what is the difference between plotting a function and entering values manually ?

restart;
with(Units[Simple]);

funktion := x -> if 2*Unit('m') < x then 1/x; else 2*Unit('m'); end if;

r1 := 3.0*Unit('m');

r2 := 6*Unit('m');

plot(funktion(x), x = r1 .. r2);
Error, (in funktion) cannot determine if this expression is true or false: 2 < x*Units:-Unit(1/m)

I have encountered the problem of extracting multivariable polynomial coefficients, such as using the remove command,

eq2 := 3*p^4*a[2]^2+6*p^2*q^2*a[2]*b[2]+3*q^4*b[2]^2+p^4;
eq2 :=convert(eq2,list);    

eq2 := [3*p^4*a[2]^2, 6*p^2*q^2*a[2]*b[2], 3*q^4*b[2]^2, p^4]

map(t->remove(has,t,{p,q}),eq2);
[3*a[2]^2, 6*a[2]*b[2], 3*b[2]^2, undefined]

eq3 := 3*p^4*a[2]^2+6*p^2*q^2*a[2]*b[2]+3*q^4*b[2]^2;
eq3 :=convert(eq3,list);

map(t->remove(has,t,{p,q}),eq3);

[3*a[2]^2, 6*a[2]*b[2], 3*b[2]^2]

Because the term p ^ 4 similar to power appears, a program should be written to calculate it,      Programming           

extractxishu:=proc(p)           

local i,xishulist,teamlist;           

teamlist:=convert(p,list);           

xishulist:=[]:           

for i in teamlist do           

if type(i,`^`) then           

xishulist:=[xishulist[],1];           

else           

xishulist:=[xishulist[],remove(has,i,{p,q})];          

  end if;           

end do:           

end proc:           

Inspection procedure:         

 eq2 := 3*p^4*a[2]^2+6*p^2*q^2*a[2]*b[2]+3*q^4*b[2]^2+p^4*c[3]+p^3*q*c[3]+6*p^3*a[1]*a[2]+6*p^2*q*a[2]*b[1]+p*q^3*d[3]+6*p*q^2*a[1]*b[2]+q^4*d[3]+6*q^3*b[1]*b[2]+p^4+4*p^3*q+p^3*c[2]+6*p^2*q^2+p^2*q*c[2]+6*p^2*a[0]*a[2]+3*p^2*a[1]^2+6*p^2*a[2]*b[0]+4*p*q^3+p*q^2*d[2]+6*p*q*a[1]*b[1]+q^4+q^3*d[2]+6*q^2*a[0]*b[2]+6*q^2*b[0]*b[2]+3*q^2*b[1]^2+p^2*c[1] +p*q*c[1]+p*q*d[1]+6*p*a[0]*a[1]+6*p*a[1]*b[0]+q^2*d[1]+6*q*a[0]*b[1]+6*q*b[0]*b[1]+p*c[0]+p*d[0]+q*c[0]+q*d[0]+3*a[0]^2+6*a[0]*b[0]+3*b[0]^2            extractxishu(eq2);           

The result is incorrect  ， It is found that the command is successful in a separate calculation, but extractxishu is invalid in the program. Why?

  Can any expert tell me where this mistake is? How to modify this program!

Can someone tell me why there is a difference between global and local variables in this code?

...cannot determine if this expression is true or false

GlobalLocal.mw

Maybe I am missing something here. Maybe it's just a new feature?

I have just installed Maple 2021 on Mac.

A simple sheet, using simplify-simplify to get units right.

Sometimes Maple doesn't update result when pressing Enter.

Sometimes Maple doesn't give any result when pressing Enter.

First everything ok:

Then I change a to 5 m. Pressing Enter on all three lines gives:

The value of A is not updated.

If I then delete the 'simplify 9 m^2' and presses Enter on the line with A:=a*b, there is no output?

Pressing Enter on blue line, no output.