Math mode

Where appropriate, PS-L^ATEX uses characters from the Symbol font. As the Symbol font is upright, Symbol-Oblique (a derived font) is used for Greek letters.

There is no equivalent Adobe font to Knuth's ``math italic'', so Times-Italic is used.

When a math character is not available in an Adobe font, the appropriate character from the CMSY, CMMI or CMEX font is used. CMEX contains the delimiters; although some of these are in the Adobe Symbol font, the CMEX set is more extensive. The CMSY font is used for many symbols, and the calligraphic math letters. Only a few of the CMMI characters are used, e.g., triangles and music symbols.

The lack of a bold Symbol font has precluded the provision of \string. Other symbols missing from these fonts are:

• a dotless j and math j
• ``curly'' epsilon and rho
• extensions for the \Leftarrow and \Rightarrow symbols. L^ATEX uses the CMR equals signs as an extension; it was deemed too expensive to load CMR at a variety of sizes merely to support this feature.