TYPE DESIGN INFORMATION PAGE last updated on Wed Nov 20 11:53:09 EST 2024
FONT RECOGNITION VIA FONT MOOSE
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Blackboard Bold
Blackboard bold symbols, often used by mathematicans, are double struck symbols. Wikipedia states this about its history: In some texts these symbols are simply shown in bold type: blackboard bold in fact originated from the attempt to write bold letters on blackboards in a way that clearly differentiated them from non-bold letters, and then made its way back in print form as a separate style from ordinary bold, possibly starting with the original 1965 edition of Gunning and Rossi's textbook on complex analysis. Some mathematicians, therefore, do not recognize blackboard bold as a separate style from bold: Jean-Pierre Serre, for example, has publicly inveighed against the use of "blackboard bold" anywhere other than on a blackboard, and uses double-struck letters when writing bold on the blackboard, whereas his published works consistently use ordinary bold for the same symbols. Donald Knuth also advises against the use of blackboard bold in print. I disagree with Knuth on this point. Blackboard Bold provides mathematicians with a nice set of extra symbols, basically doubling the capitals in the Latin alphabet. Furthermore, the blackboard bold R, C, N, Q, and Z are now deeply rooted in the mathematical community, denoting the real numbers, the complex numbers, the natural numbers, the rational numbers and the integers, respectively. |
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Luc Devroye ⦿ School of Computer Science ⦿ McGill University Montreal, Canada H3A 2K6 ⦿ lucdevroye@gmail.com ⦿ https://luc.devroye.org ⦿ https://luc.devroye.org/fonts.html |