my variables are Ve1, Vi1, U1.
In pde equation when I substitute these variables in the source term, they appear in light brown color.
Why is this so? Attaching screenshots.
Somebody please help/ Thanks in advance.
my variables are Ve1, Vi1, U1.
In pde equation when I substitute these variables in the source term, they appear in light brown color.
Why is this so? Attaching screenshots.
Somebody please help/ Thanks in advance.