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Earlier this year, there was a thread about use of text figures in mathematics: http://www.typophile.com/cgibin/discus.pl?pg=next&topic=4100&page=34733 This made me wonder, have typographers also used small caps for mathematics? I was thinking this could make uppercase variables stand out less from the surrounding text when they are discussed. Does anyone have thoughts about wether or not this is a good idea, or perhaps links to some resources about the subject?