SYM Paclet Symbol

Q

Q[index][x₁, x₂, ...]
is a special symbol for the coefficient of the canonical Lie-Bäcklund operator.

MORE INFORMATION

To use Q, you first need to load the SYM Package using Needs["SYM`"].

The characteristic form is used when looking for generalized symmetries.

The symbol occurs, for example, when constructing the infinitesimal generator for a generalized symmetry of the first order for a system of PDEs for functions u and

:

In[2]:=

Out[2]=