On Tuesday, 15 September 2020 at 21:27:25 UTC, Ola Fosheim Grøstad wrote: > On Tuesday, 15 September 2020 at 01:49:13 UTC, James Blachly > wrote: >> I wish to write a function including ∂x and ∂y (these are > > You can use the greek letter delta instead: > > δ Wouldn't that imply a normal differential?