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8 years, 256 days

thanks a lot for your attention....how c...

hi .thanks Mr Preben Alsholm ....it is ture and you say correct.however how i can reform this boundary condition and gain answer..according your idea how we chose last approxsol for boundary condition (((D@@1)(g))(1)+(1/2)*((D@@1)(s))(1)^2 = 0)and determine omega??should we use another approach such as shooting method?

please use of latest file attached below...latest_file.mw

thanks a lot

another solution...

former version has been worked correctlly, but i want gain another answer in  approxsol for

s(x)=cosh(upsilon*x)-cos(upsilon*x)-(cosh(upsilon)+cos(upsilon))*(sinh(upsilon*x)-sin(upsilon*x))/(sinh(upsilon)+sin(upsilon))

and

g(x)=sin(((2*n+1)*(1/2))*Pi*x)

which have ploted in attached file.is there any way for answer?

thanks

value for N...

amount of N is unknown....

error in dsolve "initial Newton iteratio...

hi .i encounter another error in dsolve

thanks?

another error for converging '' "initial...

hi .i encounter another error in dsolve

1)may i know that in code b=0 or b=1?

2)and line '' for b in extra_bcs do    try : print(b=1/(1)):.....

`What role in calculationomega=30-mode2.mw`

thanks?

thanks and another question...

thanks.if we need to solve same equation, but including two unkown parameters (omerga 1 and oega2)

how we can two_unkown.mwsolve it?

thanks alot

but i apply them after the loop...

@Preben Alsholm

thanks a lot. but i apply your comments in previous attached file. I think that you dont see  them after the loop....

yes i try......

hi.thanks.in first question :how i can apply a change in program which result in a loop dos not appear?(this aim dos not result by changing ; to :) for example after loop

''''''''''''''''''''''''

D(h2)(0) = 1
D(h2)(1) = 1
D(h4)(0) = 1
"initial Newton iteration is not converging"
D(h4)(1) = 1
"initial Newton iteration is not converging"
@@(D, 2)(h1)(0) = 1
"precision is insufficient for required absolute error, suggest

increasing Digits to approximately %1 for this problem", 22

...

'''''''''''''''''''''''''''''''''''''''''''''''''''''''''

`How can the above results of solution do not show after loop. i.e (Blue lines)??2)how i gain others omega2 such as 2.07982729632676 (*10^13) or 6.27005104177759 (*10^13),...which you say in previous comment?(I got 0.95... for all with guess omega2=1 and omega2= 2.33011874639388.and 4.10059501931527 with guess omega2=2 ) but not gain 2.07982729632676 (*10^13) or 6.27005104177759 (*10^13)??another_error.mw`

remove all error...

1)how i can apply a change in program which result in a loop dos not appear?(this aim dos not result by changing ; to :)

also according former your comment as

''res[(D(h2))(1)](0); #Gives the eigenvalue found earlier 2.07982729632676 (*10^13)
res[(D(h2))(0)](0); #The same
res[((D@@2)(h1))(0)]; #omega2=6.27005104177759 (*10^13)
res[((D@@3)(h1))(0)]; #omega2= 12.5461315012613 (*10^13)''

i always gain omega2= .9562827793955890006 .how i gain others such as 2.07982729632676 (*10^13) or 6.27005104177759 (*10^13),...?

3)is gain always minimum omega2 by chosing omega2=1 in approxsoln?

thanks

another error...

@Preben Alsholm

thanks really.sorry i dont notice well....i reform program, but In the following

i Further encounter with some error which is searchable in attached file for finding another omega2 as eigenvalue?

thanks.another_error.mw

how gain another omega2...

thanks.but untill major avocation for me is encounter with error in attached file.

and second is gain another omega2 as eigenvalue?however you say about it in previous comment but i have problem with

thanksother_eignvlaue.mw

yes...

yes i and farahnaz both work on same equation.

thanks.i uploaded worksheet here.also i cant gain another eigenvalues except omega2 = .95628277939558900063* 10 ^13   ...ERR0R.mw

Explained...

hi.after many comment for this problem i fell  confused.

I don't quite understand which you say''

The loop now works on the system with scaled omega2.....''

i gain omega2 = .95628277939558900063 but for another eigenvalues  i could not find them...?