On 5/16/2015 4:23 PM, Maggyero wrote:
Aditya Mahajan: By default, in all three formats the font for \log is mathupright rather than textrm. There needs to be a rationale for ConTeXt default to be different from other formats. Do you have any reference to a math book or journal that uses text fonts for \log-like operators?
Thanks for the examples. I had forgotten that math fonts can differ from text fonts. Now I understand why you use \mathupright (which, according to the source code is identical in math mode to \mathrm and \rm). And I know that math fonts have different kerning and ligatures than text fonts.
But how is that in LaTeX, kerning and ligatures in math mode inside \mathrm are the same as those of the TEXT font (while in ConTeXt \mathrm still uses the kerning and ligatures of the math font, which seems logical)? Compare the following:
LaTeX:
\documentclass{article}
\begin{document} affinity\par $\mathrm{affinity}$\par % kerning and ligatures of TEXT mode with math font \end{document}
ConTeXt:
\starttext affinity\par $\mathrm affinity$\par % kerning and ligatures of MATH mode with math font \stoptext
I have no clue how latex implements it (and don't care much either) but in context we use a unicode approach and \mathrm switches to another math alphabet ... in fact, affinity is just a sequence of a f f i n i t y (symbols, variables, whatever) and not a real word. You can use \text{affinity} but of course all depends on what the font setup is (and if your bodyfont has the same shapes for math and text). Bottom line: if you switch to \mathrm etc you don't switch fonts of styles, you switch to another alphabet. One can of course map these internally onto some text font but context doesn't work that way. Hans ----------------------------------------------------------------- Hans Hagen | PRAGMA ADE Ridderstraat 27 | 8061 GH Hasselt | The Netherlands tel: 038 477 53 69 | voip: 087 875 68 74 | www.pragma-ade.com | www.pragma-pod.nl -----------------------------------------------------------------