On Wed, Mar 26, 2008 at 12:04:43PM -0400, Mark J. Reed wrote:
: On Wed, Mar 26, 2008 at 11:24 AM, TSa <[EMAIL PROTECTED]> wrote:
: > I agree. But let me explain how I arrive at that. To me there is no
: > binary minus!
: I must agree with that one. In chalkboard mathematics, - is a unary
: negation operator, and its use as a binary op in "x - y" is just
: shorthand for "x + -y".
That interpretation doesn't help me solve my generic parsing problems,
which is about the relationship of op1 to op2 and op3 in
op1 a() op2 b() op3 c()
and presumably the same thing for postfixes in the other order.
So here's another question in the same vein. How would mathematicians
read these (assuming Perl has a factorial postfix operator):
1 + a(x)**2!
1 + a(x)²!