Math input methods

[Hans Aberg]

On 5 Jun 2014, at 04:50, David Starner <prosfilaes at gmail.com> wrote:

> On Wed, Jun 4, 2014 at 6:00 AM, Jukka K. Korpela <jkorpela at cs.tut.fi> wrote:
>> The change is logical in the sense that bold face is a
>> more original notation and double-struck letters as characters imitate the
>> imitation of boldface letters when writing by hand (with a pen or piece of
>> chalk).
> 
> On the other hand, bold face is a minor variation on normal types.
> Double-struck letters are more clearly distinct, which is probably why
> they moved from the chalkboard to printing in the first place. I don't
> see much advantage of ���������� over ℕℂℝℤℚ, especially when
> confusability with NCRZQ comes into play.

The double-struck letters are useful in math, because they free other letter styles for other use. First, only a few were used as for natural, rational, real and complex numbers, but became popular so that all letters, uppercase and lowercase, are now available in Unicode.