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These are questions asked by iman

Problem with Determinant...

Asked: iman 35 Product: Maple 2015

January 15 2016

2 6

hi.after calculate Determinant of matrix and gain value omega'' ω'' by fsolve rule ,when substuting result (ω) in matrix (q) and calculate Determinant again, this value is not zero!!!! may i use LUDecomposition?determinan.mw

Error in dsolve...

Asked: iman 35 Product: Maple 2015

January 06 2016

1 0

hi.please remove error in attached file

thanks...gfhf.mw

Error in pdsolve...

Asked: iman 35 Product: Maple 2015

December 12 2015

0 5

hi.i encounter error in pdsole equations with unknown parameter(N)??

please help me for solve it....thanks alotmaple_prime.mw

Error in pdsolve...

Asked: iman 35 Product: Maple

September 06 2015

1 7

Hi everyone.

I have been experiencing a problem trying to solve a coupled system of 3 differencial equations

My problem is that a got a message back as I try to solve the system:

"Error, (in pdsolve/numeric/process_IBCs) improper op or subscript selector"

by apply this point that ''all dependent variables must be functions of the same independent variables''

i again accost with another error ''

Error, (in pdsolve/numeric/process_IBCs) initial/boundary conditions can only contain derivatives which are normal to the boundary, got (D[1, 1](w))(x, -3/400000000)

please help me.....very very thanks

Root of answer ...

Asked: iman 35 Product: Maple 17

August 19 2014

2 -1

$restart; solve({(m*yc+b)^3*yc^3/((2*m*yc+b)*(m*y1+b)*y1)-(m*yc+b)^3*yc^3/((2*m*yc+b)*(m*y2+b)*y2) = y2^2*((1/2)*b+(1/3)*m*y2)-y1^2*((1/2)*b+(1/3)*m*y1)}, {yc})$

${yc = RootOf((6*m^4*y1+6*m^4*y2+6*b*m^3)*_Z^6+(18*b*m^3*y1+18*b*m^3*y2+18*b^2*m^2)*_Z^5+(18*b^2*m^2*y1+18*b^2*m^2*y2+18*b^3*m)*_Z^4+(6*b^3*m*y1+6*b^3*m*y2+6*b^4)*_Z^3+(-4*m^4*y1^4*y2^2-4*m^4*y1^3*y2^3-4*m^4*y1^2*y2^4-4*b*m^3*y1^4*y2-14*b*m^3*y1^3*y2^2-14*b*m^3*y1^2*y2^3-4*b*m^3*y1*y2^4-10*b^2*m^2*y1^3*y2-16*b^2*m^2*y1^2*y2^2-10*b^2*m^2*y1*y2^3-6*b^3*m*y1^2*y2-6*b^3*m*y1*y2^2)*_Z-2*b*m^3*y1^4*y2^2-2*b*m^3*y1^3*y2^3-2*b*m^3*y1^2*y2^4-2*b^2*m^2*y1^4*y2-7*b^2*m^2*y1^3*y2^2-7*b^2*m^2*y1^2*y2^3-2*b^2*m^2*y1*y2^4-5*b^3*m*y1^3*y2-8*b^3*m*y1^2*y2^2-5*b^3*m*y1*y2^3-3*b^4*y1^2*y2-3*b^4*y1*y2^2)}$
(1)

$restart; solve({q/g^.5 = ((yc*z+b)*yc)^1.5/(2*Z*yc+b)^.5}, {yc})$

${yc = .5000000000*(RootOf(g*z^3*_Z^12+(6*Z*b*g*z^2-6*b*g*z^3)*_Z^10+(12*Z^2*b^2*g*z-30*Z*b^2*g*z^2+15*b^2*g*z^3)*_Z^8+(8*Z^3*b^3*g-48*Z^2*b^3*g*z+60*Z*b^3*g*z^2-20*b^3*g*z^3)*_Z^6+(-24*Z^3*b^4*g+72*Z^2*b^4*g*z-60*Z*b^4*g*z^2+15*b^4*g*z^3)*_Z^4+(24*Z^3*b^5*g-48*Z^2*b^5*g*z+30*Z*b^5*g*z^2-6*b^5*g*z^3-64*Z^6*q^2)*_Z^2-8*Z^3*b^6*g+12*Z^2*b^6*g*z-6*Z*b^6*g*z^2+b^6*g*z^3)^2-1.*b)/Z}$
(2)

$solve({g*yc^6*z^3+3*b*g*yc^5*z^2+3*b^2*g*yc^4*z+b^3*g*yc^3-2*Z*q^2*yc-b*q^2 = 0}, {yc})$

${yc = RootOf(_Z^6*g*z^3+3*_Z^5*b*g*z^2+3*_Z^4*b^2*g*z+_Z^3*b^3*g-2*Z*_Z*q^2-b*q^2)}$
(3)

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