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This morning I had a brief discussion about different notations of trigonometric functions in Europe, so I looked for an online resource dealing with these diversities in mathematical notation. I found this paper treating the issue. It links to a website called Notation census which aims to deal with the diversity by listing the variations in the notation around the world. Still, I find it quite hard to browse the site and feel that lot of things are still not included in its database. Therefore, my question is: do you know of a book or a website compiling these differences in notation in which one can find the most of the non-orthodox symbols and abbreviations used in the world?

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I would add that differences exist not only across different (geographical) locations, but across different cultures. For example, I have seen different attitudes towards notation for identity matrix among linear algebraists and others (algebraic geometeres, dynamical system-ists). – Pasha Zusmanovich Jan 6 '11 at 0:59

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