Function: del (<x>)
del (<x>) represents the differential of the variable x.
diff returns an expression containing
del if an independent variable is not specified. In this case, the return value is the so-called "total differential".
(%i1) diff (log (x)); del(x) (%o1) ------ x (%i2) diff (exp (x*y)); x y x y (%o2) x %e del(y) + y %e del(x) (%i3) diff (x*y*z); (%o3) x y del(z) + x z del(y) + y z del(x)
There are also some inexact matches for
?? del to see them.
(%o1) true (%i2)