acahalan at gmail.com
Tue Oct 9 05:00:23 EDT 2007
On 10/9/07, Mitch Bradley <wmb at laptop.org> wrote:
> Bert Freudenberg wrote:
> > On Oct 9, 2007, at 8:15 , Albert Cahalan wrote:
> >> I notice that some keyboards lack the multiplication
> >> and division symbols. Providing them for all kids
> >> would be good, even if they need to move elsewhere.
> > Why those? They are not used universally.
> And even in places where they are used, like the US, they fall into
> disuse when you get to algebra. The multiplication symbol is too much
> like the variable x, and the division symbol is replaced by
> numerator-over-denominator notation.
1. The target audience is mostly below algebra.
2. The cross product is used in college.
> > At least German kids are
> > taught to use "·" (centered dot) for multiplication and ":" (colon)
> > for division. And for real math formulae you don't need those either.
Well, you have the colon, and I did suggest the centered dot.
I forgot the infinity symbol.
In case anybody wonders, the list comes from the symbols
that tend to show up in character set standards. I picked
though many of those while making a font.
registered trademark symbol
not equals symbol
center dot (math)
set union symbol
set intersection symbol
plus or minus symbol
power of 2
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