SIAM supports the use of the AMS-TEX fonts (version 2.0
and later). As described in the manual for these fonts,
they can be included by \input{amssym.def} and
\input{amssym.tex}. The blackboard bold font in this
font package is can be used for designating number sets.
This is preferable to other methods of combining letters
(such as I and R for the real numbers) to produce pseudo-bold
letters but this is tolerable as well. Typographicly speaking,
number sets may simply be designated using regular bold letters;
the blackboard bold typeface was designed in response to a desire
to simulate the limitations of a chalkboard in type.
SIAM's style macros are not yet updated to make full use of the New Font Selection Scheme (NFSS) of Mittelbach and Schöpf. The macros are generally compatible with the NFSS if using the oldlfont style option. Note: lines 339, 340, 348, 349, and 351 of siamltex.sty need to be commented out to run under the NFSS. Those lines add additional font capability in a manner incompatible with and redundant to the NFSS. Line 351 calls in the cmcsc8 font, which is unanvailable in some installations. The small caps font, along with other AMS fonts, is available from the American Mathematical Society.