## 55 Reputation

6 years, 229 days

## Thank you so much @dharr ...

Thank you so much @dharr

## Thank you @Mariusz Iwaniuk  ...

Thank you @Mariusz Iwaniuk

## Thank you @Carl Love  I am ex...

Thank you @Carl Love

## Thank you @Preben Alsholm , I ...

But for other equation the singularity will show up , and we can’t change the form of equation , so for that if it's possible  I  need a conditional if to re-solve the equation for example if it's a singularity must return and solve it ( dsolve ) and so that , I hope I have clarified the situation.

Algorithm

Random coefficient

Dsolve

Calculate eng

If eng = singularity

Return and dsolve

Else, end if

thank you

## Thank you @J4James , but i st...

Thank you @J4James ,

but i steal have probleme whene i change the last condition from 70 to 100

psi(0.174568e-1) = 100, i get the flowing error ;

Error, (in dsolve/numeric/ComputeSolution) Newton iteration is not converging

best regards

## thank you Mr.@Preben Alsholm  i wi...

thank you Mr.@Preben Alsholm

i will look for other way

Best regards!

i defined the parameters but the problem still not solved

 > restart:with(inttrans):
 > E:=1;L:=1;k:=1;R:=1;m:=1;
 (1)
 > θl:=arccos(y(t)/R)
 (2)
 >
 (3)
 > eq:=fourier(equ,t,w);
 (4)
 >
 (5)
 >

Thank you

thank you for your answer , but it's not work with dsolve

Hi

Good idea

thanks :)

## Thank you very much ...

Thank you very much

## how i can plot these solution ?...

how i can plot these solution ?

## thank you it's work ...

thank you it's work

## thank you  but theres other tools w...

thank you

but theres other tools without LambertW

## thank you Preben Alsholm  it's...

thank you Preben Alsholm  it's work

## thanks...

Thank you so much Thomas Richard & thank you for your advice I appreciate that.

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