1 | initial version |

var('t,x3')

p1= -3+2.5*tanh(2.*t)+(3.19*sech(x3)-2.69)*I

p2= -3+2.5*tanh(2.*t)-(3.19*sech(x3)-2.69)*I

p3=-4

diagAbar= diagonal_matrix(Ta.[p1,p2,p3])

dAbar=diagAbar.subs(t=0);dAbar

Playing around with dAbar I found that:

TdiagAbar=dAbar.conjugate()

works, but

TdiagAbar=dAbar.transpose()

and

TdiagAbar=dAbar.conjugate()+dAbar

do not work. Sorry, I didn't follow much of what link said. I do a lot of symbolic math with symbolic variables such as with t and x3 above. I know MATLAB well and Mathematica somewhat. I would prefer to support Sage. Thanks for your help.

nonlinear

var('t,x3')

```
var('t,x3')
p1=
```~~-3+2.5~~*tanh(2.*t)+(3.19*sech(x3)-2.69)*I -3+2.5*tanh(2.*t)+(3.19*sech(x3)-2.69)*I
p2= ~~-3+2.5~~*tanh(2.*t)-(3.19*sech(x3)-2.69)*I

p3=-4

-3+2.5*tanh(2.*t)-(3.19*sech(x3)-2.69)*I
p3=-4
diagAbar= ~~diagonal_matrix(Ta.[p1,p2,p3])~~

dAbar=diagAbar.subs(t=0);dAbar

diagonal_matrix(Ta.[p1,p2,p3])
dAbar=diagAbar.subs(t=0);dAbar

Playing around with dAbar I found that:

TdiagAbar=dAbar.conjugate()

```
TdiagAbar=dAbar.conjugate()
```

works, but

TdiagAbar=dAbar.transpose()

```
TdiagAbar=dAbar.transpose()
```

and

TdiagAbar=dAbar.conjugate()+dAbar

```
TdiagAbar=dAbar.conjugate()+dAbar
```

do not work. Sorry, I didn't follow much of what link said. I do a lot of symbolic math with symbolic variables such as with t and x3 above. I know MATLAB well and Mathematica somewhat. I would prefer to support Sage. Thanks for your help.

nonlinear

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