**Next message:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Previous message:**Karl Pentzlin: "Re: Unicode Cyrillic GHE DE PE TE in Serbian"**Next in thread:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Maybe reply:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Maybe reply:**Jonathan Rosenne: "RE: Right-to-left mathematics"**Maybe reply:**James E. Agenbroad: "Re: Right-to-left mathematics"**Maybe reply:**Kenneth Whistler: "Re: Right-to-left mathematics"**Maybe reply:**Jonathan Rosenne: "RE: Right-to-left mathematics"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

Hallo.

Some Unicode character have the "mirrored" property. This means that, when

they occur in a right-to-left context, they should be displayed with an

alternative reversed glyph. For example, an open parenthesis looks like "("

in LTR, but like ")" in RTL.

a) This applies to all opening/closing punctuation, e.g.:

U+0028 / U+0029 (LEFT ... / RIGHT PARENTHESIS)

U+00AB / U+00BB (LEFT-... / RIGHT-POINTING DOUBLE ANGLE QUOTATION

MARK)

b) The same applies with some pairs of mathematical operators, that are the

opposite of each other, both in shape as in meaning; e.g.:

U+003C / U+003E (LESS-... / GREATER-THAN SIGN)

U+2208 / U+220B (ELEMENT OF / CONTAINS AS MEMBER)

c) But also some unpaired mathematical operators have the "mirrored"

property, e.g.:

U+221A (SQUARE ROOT)

U+222B (INTEGRAL)

I guess that, in cases (a) and (b), fonts actually just contain one pair of

glyphs, and "swap" their encoding as needed by the bidi context. But, for

case (c), ad-hoc reversed glyphs must be designed separately.

Are the mirrored glyphs for case (c) operators actually used in

right-to-left languages?

What do mathematical formulas look like in Hebrew, Arabic, Urdu, Pashto,

Thaana, etc.? Are they always RTL or is sometimes LTR used (as is the case

for Hebrew music)?

What is the attitude of font designers? Are you providing "reversed" maths

glyphs for RTL scripts?

Anyone knows examples of mathematical applications that implement bidi? How

do they work?

Thanks.

Marco

**Next message:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Previous message:**Karl Pentzlin: "Re: Unicode Cyrillic GHE DE PE TE in Serbian"**Next in thread:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Maybe reply:**Roozbeh Pournader: "Re: Right-to-left mathematics"**Maybe reply:**Jonathan Rosenne: "RE: Right-to-left mathematics"**Maybe reply:**James E. Agenbroad: "Re: Right-to-left mathematics"**Maybe reply:**Kenneth Whistler: "Re: Right-to-left mathematics"**Maybe reply:**Jonathan Rosenne: "RE: Right-to-left mathematics"**Messages sorted by:**[ date ] [ thread ] [ subject ] [ author ] [ attachment ]**Mail actions:**[ respond to this message ] [ mail a new topic ]

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