Subscript letters

Sindre's picture

Unicode points 2090–2094 are described as subscript a, e, o, x and schwa. The official Unicode chart says nothing about the usage of those glyphs, and I can't seem to find information on them elsewhere. Can anyone shed some light on this?

Igor Freiberger's picture

Subscript e is used to indicate eletrons and also in Euler notation for derivatives. Subscripts a, e, and x are used in logarithms.

Sindre's picture

Thank you very much, Igor. Only the schwa to worry about now ...

DTY's picture

These were put into Unicode for historical linguistics, where there can be an obligatory semantic difference between the subscript and non-subscript letters:
http://std.dkuug.dk/jtc1/sc2/wg2/docs/n2788.pdf

Sindre's picture

Than you ever so much, David. Much appreciated. I really should have known this! (May I be redeemed by the fact that my two typefaces in the works already support reconstructed Proto-Indo-European and Proto-Norse, and have stylistic sets for Transcribed Gothic.)

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