network profile
| bio | website | cs.tut.fi/~jkorpela |
|---|---|---|
| location | Finland | |
| age | 61 | |
| visits | member for | 1 year, 1 month |
| seen | yesterday | |
| stats | profile views | 21 |
I’m an author and a consultant who specializes in character codes, localization, web authoring, accessibility, and typography. Author of Unicode Explained and Going Global with JavaScript and Globalize.js.
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May 12 |
comment |
Bold \varnothing The idea of upper/lower case distinction might be applicable to symbols; many fonts contain upper and lower case versions of some punctuation characters, and a similar distinction is imaginable for operators, too. It’s really the bolding that raises the question “why?” Math expressions should normally not be bolded, since bolding of letters and some symbols may indicate difference in meaning (e.g., bold letters might denote vectors). So bolding as stylistic device should be avoided. |
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May 12 |
answered | Laplace and Fourier transforms |
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Apr 2 |
awarded | Yearling |
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Mar 14 |
awarded | Popular Question |
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Jan 2 |
comment |
Bar-less “f” and finetuning existing characters The letter esh is a distinct symbol, an IPA phonetic character, and should not be confused with the issue of rendering the letter f. For the latter, you simply need a font that suits your needs, either in the default shape of the letter f or as an alternate form available using OpenType features. |
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Dec 12 |
answered | Displaying special character (which name I don't know) |
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Dec 11 |
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Support for all writing systems in a single document — more than just one or two Unicode planes simultaneously Do you mean Unicode planes, or blocks? |
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Dec 10 |
awarded | Commentator |
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Dec 10 |
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How can I write tilde ~ in math mode? Using \sim would appear to be the mathematically most correct way, since it produces TILDE OPERATOR (which is vertically positioned at operator level) as opposite to the Ascii TILDE (typically positioned higher). |
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Dec 5 |
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Looking for an “S” symbol As a character, the symbol can be identified as SCRIPT CAPITAL S U+1D4AE. Its appearance varies greatly across fonts (the fairly few fonts that have it), but the one seen here seems to correspond to mathematical practice, though script letters generally tend to be somewhat slanted. |
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Nov 10 |
answered | \star vs. \ast in formulas. Which one to use? |
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Oct 26 |
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How to imitate a character that looks similar to an inverted 2? LATIN CAPITAL LETTER ESH has the comment “African” in the Unicode Standard, and it is intended for orthographies of some African languages. In all fonts that support it, it seems to be very much like capital sigma. So it’s really not appropriate here. |
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Oct 24 |
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LaTeX in Blogger The link “this post” does not work any more. |
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Oct 16 |
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ISO: cross product The question was about ISO norms (= standards). ISO 80000-2 has a broader scope of application than its name may suggest; the standard itself says in a footnote: ‘Title to be shortened to read “Mathematics” in the second edition of ISO 80000-2.’ and in the ‘Scope’ section: ‘The recommendations in ISO 80000-2 are intended mainly for use in the natural sciences and technology, but also apply to other areas where mathematics is used.’ |
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Oct 15 |
answered | ISO: cross product |
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Oct 13 |
answered | Correct symbol for the Laplace operator ($\Delta$) |
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Oct 7 |
answered | How to find out which glyphs are different in an OpenType style set? |
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Jul 23 |
comment |
name of logical negation symbol As a character, it’s “¬” U+00AC NOT SIGN, and it’s the standard symbol for negation in logic and mathematics (most recently, as per the ISO 80000-2 standard, which does not even mention other notations for it). |
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Jun 9 |
awarded | Teacher |
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Jun 9 |
answered | Uniform distribution symbol |
