On 5 Jun 2014, at 04:50, David Starner <prosfil...@gmail.com> wrote: > On Wed, Jun 4, 2014 at 6:00 AM, Jukka K. Korpela <jkorp...@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 πππππ over ββββ€β, 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. _______________________________________________ Unicode mailing list Unicode@unicode.org http://unicode.org/mailman/listinfo/unicode
