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Thread Subject:
Matrix 8x8

Subject: Matrix 8x8

From: george veropoulos

Date: 26 Jun, 2010 17:45:06

Message: 1 of 4

Hi

I have a matrix 8x8 with a symbolic parameter E

I m trying to solve the equation det(A)=0 to find the ukmow parameter E
but the matlab can't find any solution. Please any HELP!
The matrix have the following componets
A11=-exp(i*k_2*(D+L));
A12=0;
A13=0;
A14=0;
A15=exp(-i*k_1*(D+L));
A16=exp(i*k_2*(D+L));
A17=0;
A18=0;
A21=(i*k_2/m2_star)*exp(i*k_2*(D+L));
A22=0;
A23=0;
A24=0;
A25=(i*k_1/m1_star)*exp(-i*k_1*(D+L));
A26=(-i*k_2/m2_star)*exp(-i*k_2*(D+L));
A27=0;
A28=0;
A31=exp(i*D*k_2);
A32=-exp(-i*k_4*D);
A33=0;
A34=0;
A35=0;
A36=exp(-i*k_2*D);
A37=-exp(-i*k_3*D);
A38=0;
A41=(i*k_2/m2_star)*exp(i*k_2*D);
A42=(i*k_3/m3_star)*exp(i*k_3*D);
A43=0;
A44=0;
A45=0;
A46=-(i*k_2/m2_star)*exp(-i*k_2*D);
A47=(i*k_3/m3_star)*exp(-i*k_3*D);
A48=0;
A51=0;
A52=exp(-i*k_3*D);
A53=-exp(-i*k_4*D);
A54=0;
A55=0;
A56=0;
A57=exp(i*k_3*D);
A58=-exp(i*k_4*D);
A61=0;
A62=(i*k_3/m3_star)*exp(-i*k_3*D);
A63=-(i*k_4/m4_star)*exp(-i*k_4*D);
A64=0;
A65=0;
A66=0;
A67=-(i*k_3/m3_star)*exp(i*k_3*D);
A68=-(i*k_4/m4_star)*exp(i*k_4*D);
A71=0;
A72=0;
A73=exp(-i*k_4*(D+L1));
A74=exp(-i*k_5*(D+L));
A75=0;
A76=0;
A77=0;
A78=exp(i*k_4*(D+L1));
A81=0;
A82=0;
A83=(i*k_4/m4_star)*exp(-i*k_4*(D+L1));
A84=-(i*k_5/m5_star)*exp(-i*k_5*(D+L1));
A85=0;
A86=0;
A87=0;
A88=-(i*k_4/m4_star)*exp(D+L1)
The parameter D,L1, L, m1_star etc have a value or have a dependence from E.

Thank you very much

George Veropoulos

Subject: Matrix 8x8

From: us

Date: 26 Jun, 2010 17:54:05

Message: 2 of 4

"george veropoulos" <veropgr@yahoo.gr> wrote in message <i05eb2$7o$1@fred.mathworks.com>...
> Hi
>
> I have a matrix 8x8 with a symbolic parameter E
>
> I m trying to solve the equation det(A)=0 to find the ukmow parameter E
> but the matlab can't find any solution. Please any HELP!
> The matrix have the following componets
> A11=-exp(i*k_2*(D+L));
> A12=0;
> A13=0;
> A14=0;
> A15=exp(-i*k_1*(D+L));
> A16=exp(i*k_2*(D+L));
> A17=0;
> A18=0;
> A21=(i*k_2/m2_star)*exp(i*k_2*(D+L));
> A22=0;
> A23=0;
> A24=0;
> A25=(i*k_1/m1_star)*exp(-i*k_1*(D+L));
> A26=(-i*k_2/m2_star)*exp(-i*k_2*(D+L));
> A27=0;
> A28=0;
> A31=exp(i*D*k_2);
> A32=-exp(-i*k_4*D);
> A33=0;
> A34=0;
> A35=0;
> A36=exp(-i*k_2*D);
> A37=-exp(-i*k_3*D);
> A38=0;
> A41=(i*k_2/m2_star)*exp(i*k_2*D);
> A42=(i*k_3/m3_star)*exp(i*k_3*D);
> A43=0;
> A44=0;
> A45=0;
> A46=-(i*k_2/m2_star)*exp(-i*k_2*D);
> A47=(i*k_3/m3_star)*exp(-i*k_3*D);
> A48=0;
> A51=0;
> A52=exp(-i*k_3*D);
> A53=-exp(-i*k_4*D);
> A54=0;
> A55=0;
> A56=0;
> A57=exp(i*k_3*D);
> A58=-exp(i*k_4*D);
> A61=0;
> A62=(i*k_3/m3_star)*exp(-i*k_3*D);
> A63=-(i*k_4/m4_star)*exp(-i*k_4*D);
> A64=0;
> A65=0;
> A66=0;
> A67=-(i*k_3/m3_star)*exp(i*k_3*D);
> A68=-(i*k_4/m4_star)*exp(i*k_4*D);
> A71=0;
> A72=0;
> A73=exp(-i*k_4*(D+L1));
> A74=exp(-i*k_5*(D+L));
> A75=0;
> A76=0;
> A77=0;
> A78=exp(i*k_4*(D+L1));
> A81=0;
> A82=0;
> A83=(i*k_4/m4_star)*exp(-i*k_4*(D+L1));
> A84=-(i*k_5/m5_star)*exp(-i*k_5*(D+L1));
> A85=0;
> A86=0;
> A87=0;
> A88=-(i*k_4/m4_star)*exp(D+L1)
> The parameter D,L1, L, m1_star etc have a value or have a dependence from E.
>
> Thank you very much
>
> George Veropoulos

you must come up with a more CSSMer friendly way to demonstrate/visualize your problem...

us

Subject: Matrix 8x8

From: george veropoulos

Date: 26 Jun, 2010 18:25:23

Message: 3 of 4

"george veropoulos" <veropgr@yahoo.gr> wrote in message <i05eb2$7o$1@fred.mathworks.com>...
> Hi Dear friends
> i have a problem .
> I have a matrix 8x8 with a symbolic parameter E
>
> I m trying to solve the equation det(A)=0 to find the ukmow parameter E
> but the matlab can't find any solution. What can I do?
Please can you help me....
> The matrix have the following componets
> A11=-exp(i*k_2*(D+L));
> A12=0;
> A13=0;
> A14=0;
> A15=exp(-i*k_1*(D+L));
> A16=exp(i*k_2*(D+L));
> A17=0;
> A18=0;
> A21=(i*k_2/m2_star)*exp(i*k_2*(D+L));
> A22=0;
> A23=0;
> A24=0;
> A25=(i*k_1/m1_star)*exp(-i*k_1*(D+L));
> A26=(-i*k_2/m2_star)*exp(-i*k_2*(D+L));
> A27=0;
> A28=0;
> A31=exp(i*D*k_2);
> A32=-exp(-i*k_4*D);
> A33=0;
> A34=0;
> A35=0;
> A36=exp(-i*k_2*D);
> A37=-exp(-i*k_3*D);
> A38=0;
> A41=(i*k_2/m2_star)*exp(i*k_2*D);
> A42=(i*k_3/m3_star)*exp(i*k_3*D);
> A43=0;
> A44=0;
> A45=0;
> A46=-(i*k_2/m2_star)*exp(-i*k_2*D);
> A47=(i*k_3/m3_star)*exp(-i*k_3*D);
> A48=0;
> A51=0;
> A52=exp(-i*k_3*D);
> A53=-exp(-i*k_4*D);
> A54=0;
> A55=0;
> A56=0;
> A57=exp(i*k_3*D);
> A58=-exp(i*k_4*D);
> A61=0;
> A62=(i*k_3/m3_star)*exp(-i*k_3*D);
> A63=-(i*k_4/m4_star)*exp(-i*k_4*D);
> A64=0;
> A65=0;
> A66=0;
> A67=-(i*k_3/m3_star)*exp(i*k_3*D);
> A68=-(i*k_4/m4_star)*exp(i*k_4*D);
> A71=0;
> A72=0;
> A73=exp(-i*k_4*(D+L1));
> A74=exp(-i*k_5*(D+L));
> A75=0;
> A76=0;
> A77=0;
> A78=exp(i*k_4*(D+L1));
> A81=0;
> A82=0;
> A83=(i*k_4/m4_star)*exp(-i*k_4*(D+L1));
> A84=-(i*k_5/m5_star)*exp(-i*k_5*(D+L1));
> A85=0;
> A86=0;
> A87=0;
> A88=-(i*k_4/m4_star)*exp(D+L1)
> The parameter D,L1, L, m1_star etc have a value or have a dependence from parameter E.
>
> Thank you very much
>
> George Veropoulos

Subject: Matrix 8x8

From: us

Date: 26 Jun, 2010 19:03:05

Message: 4 of 4

"george veropoulos" <veropgr@yahoo.gr> wrote in message <i05gmj$sph$1@fred.mathworks.com>...
> "george veropoulos" <veropgr@yahoo.gr> wrote in message <i05eb2$7o$1@fred.mathworks.com>...
> > Hi Dear friends
> > i have a problem .
> > I have a matrix 8x8 with a symbolic parameter E

> > The parameter D,L1, L, m1_star etc have a value or have a dependence from parameter E.
> >
> > Thank you very much
> >
> > George Veropoulos

did you look at what was told you before - or are you simply and unreflectedly repeating you OP(?)...

us

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