[texhax] math notation
Michael Barr
mbarr at math.mcgill.ca
Wed May 10 20:00:48 CEST 2006
"d" is an operator, but a constant operator (I never intended "constant"
to refer only to numerical constant). As far as I am concerned i is a
number, exactly as much of a one as -1. But all of "i", "e", "d" are
constants. But can you imagine a variable d and \int_0^1f(d)\diff d?
Incidentally, one of my pet peeves is that the d in mit leans so far to
the right that it interferes with superscripts. I use d^? all the time
for face operators in a simplicial object. I suppose I could use an
upright d, but I don't in accordance with the principle enunciated in my
original post.
On Wed, 10 May 2006, Philip TAYLOR wrote:
>
>
> Michael Barr wrote:
> > A bit of history might help here. In traditional typesetting, variables
> > were put in italics and constants upright. So clearly the differential d
> > and the base e of the natural logarithm are constants.
>
> Clearly ? "e" is most certainly a constant, but surely "i" (as in the square
> root of minus one) is often referred to as an operator, and the "d" of "dx"
> is (IMHO) no more similar to "e" than it is to "i" ...
>
> ** Phil.
>
More information about the texhax
mailing list