LODEstruct - data structure to represent an ODE
|
Description
|
|
•
|
LODEstruct is a data structure to represent an ordinary differential equation. It is created by Slode[DEdetermine].
|
•
|
The entries of an LODEstruct are a set of equations, representing the differential equation, and a set of function names, representing the dependent variables.
|
•
|
The data structure has an attribute table with the following entries:
|
–
|
L - the differential operator in diff notation
|
–
|
rhs - the right hand side of the equation
|
–
|
fun - the name of the dependent variable, for example
|
–
|
var - the name of the independent variable, for example
|
–
|
linear - if L is a linear differential operator and otherwise
|
–
|
coeffs - an Array of coefficients of L
|
–
|
polycfs - if all coefficients are polynomial and otherwise
|
–
|
d_max - the maximum degree of polynomial coefficients
|
–
|
mvar - the name of the independent variable,
|
–
|
index - the name of the summation index,
|
–
|
point - the expansion point , possibly
|
–
|
initial - an Array of initial series coefficients
|
–
|
H - the expression
|
–
|
P_n - either or
|
|
|
Examples
|
|
>
|
|
>
|
|
| (1) |
>
|
|
| (2) |
>
|
|
| (3) |
>
|
|
| (4) |
>
|
|
| (5) |
>
|
|
| (6) |
>
|
|
| (7) |
|
|
Download Help Document
Was this information helpful?