Re: Motion M0034.01 -- Notations
On 2012-06-04 09:14:18 -0500, Nate Hayes wrote:
> Real numbers have positive and negative elements, and intervals have proper
> and improper elements. Kaucher used the notation with the "I" and the "R"
> both in Blackboard Bold font for the set of intervals isomorphic to the R^2
> plane. This set also forms a group with respect to addition. When the "I" is
> in solid Bold font and the "R" remains in Blackboard Bold font, this denoted
> the subset of proper intervals [a,b] such that a <= b.
I think that it would be a bad idea to use both kinds of fonts with
different meanings, because bold is sometimes used as a fallback for
blackboard bold fonts.
I also think that the notations should easily be transposable to
hand writing (where it's difficult to do real bold characters)
without ambiguity.
I wondered whether a simple capital Roman letter I (not italic) could
be used instead of the blackboard bold I.
--
Vincent Lefèvre <vincent@xxxxxxxxxx> - Web: <http://www.vinc17.net/>
100% accessible validated (X)HTML - Blog: <http://www.vinc17.net/blog/>
Work: CR INRIA - computer arithmetic / AriC project (LIP, ENS-Lyon)