kencom1

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6 years, 245 days
UNIVERSITY OF LAGOS, AKOKA YABA, LAGOS
LAGOS, Nigeria

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These are questions asked by kencom1

Good morning sirs,

I have been trying to compute this problem to its given me the error message "Error, invalid input: rhs received {f[0](eta) = -(1/50)*eta^2+(1/5)*eta+1/5, theta[0](eta) = -eta+5}, which is not valid for its 1st argument, expr".

The problem is attach below.

Please, anyone with useful informations should help.

Thanks

HPM_4.mw

Hello everyone,

Compliment of the season. I received the error message while trying to solve some Pade approximant problem and try to find what could possibly be the error but could not.

Please, anyone with good informations on the possible solutions should help.

Thanks. The Link is below

 Error.mw

Please, anyone with usefull informations to hint me. Looking forward to your favorable response. 

Thanking you in advance

Good day everyone,

I am having challenges copying equations from Maple 2016 to word. Anyone with useful information should share please.

Thank you in anticipation for your kind gesture

 Can anyone help me with this problem. I am trying to solve it and its given me an error message "Error, (in dsolve/numeric/bvp) cannot determine a suitable initial profile, please specify an approximate initial solution".


 

restart

with(ODETools):

with(student):

dsolve[interactive]()

with(plots)

with(plottools)

inf := 5

unprotect('gamma')

NULL

equ1 := diff(f(eta), `$`(eta, 3))-(3/4)*f(eta)*(diff(f(eta), `$`(eta, 2)))+(1/2)*(diff(f(eta), eta))^2-theta(eta)-N*gamma(eta) = 0:

equ2 := diff(theta(eta), `$`(eta, 2))-(3/4)*f(eta)*(diff(theta(eta), eta)) = 0:

equ3 := diff(gamma(eta), `$`(eta, 2))-(3/4)*L__e*P__r*f(eta)*(diff(gamma(eta), eta)) = 0:

Bcs := f(0) = 0, (D(f))(0) = 0, theta(0) = 1, (D(f))(inf) = 0, theta(inf) = 0, gamma(0) = 1, gamma(inf) = 0

f(0) = 0, (D(f))(0) = 0, theta(0) = 1, (D(f))(5) = 0, theta(5) = 0, gamma(0) = 1, gamma(5) = 0

(1)

Parameter := [P__r = .72, N = 1, L__e = 1]:

S1 := dsolve({Bcs, subs(Parameter, equ1), subs(Parameter, equ2), subs(Parameter, equ3)}, {f(eta), gamma(eta), theta(eta)}, type = numeric)

Error, (in dsolve/numeric/bvp) cannot determine a suitable initial profile, please specify an approximate initial solution

 

``


 

Download Numerical.mw

 Looking forward to your favorable response.

Kind regard

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