I normally use it in text mode because, as a Basic Latin character, text fonts are much more likely to have it. Of these, the following are mapped to LaTeX commands by unicode-math: There are no fewer than thirteen vertically-centered dots in Unicode 11.0, as of 2019. (I think the arrows indicate references to similarly- looking rather than to semantically similar symbols.)īlock “ C1 Controls and Latin-1 Supplement”, Section title “Latin-1 punctuation and symbols” Use 22C5 ⋅ DOT OPERATOR for multiplication and 2219 ∙ BULLET OPERATOR for own operations. Since, your query for “house rules for mathematical typesetting” is not so far off, forasmuch I have experienced that in my math lectures, every professor would define these symbols at the beginning of the semester and there were differences throughout the lectures, of course. (This is very interesting when speaking about abstract algebraic structures, such as fields and vector spaces, when one uses only abstract operations.) So I would say that semantically you are on the safe side, so to speak, as maybe the Unicode Consortium has spoken to mathematicians who told them that the dot can be-and which is being-redefined to meet the mathematician’s need. Interestingly, for the 2218 ∘ RING OPERATOR symbol, the annotation does just that: “= composite function”. This can be done, from my point of view again, because the Unicode standard does not define this operator to represent any mathematical operation. One will probably get the most “regular-looking” result with using the 22C5 ⋅ DOT OPERATOR for regular (scalar) multiplication and the 2219 ∙ BULLET OPERATOR for any other (user-defined) operation on other objects.
BULLET, respectively, when it comes to appearance.
MIDDLE DOT and 2219 ∙ BULLET OPERATOR of 2022.BULLET should be used as a list symbol exclusively.Īs I think it, the 22C5 ⋅ DOT OPERATOR is the mathematical version of 00B7.MIDDLE DOT symbol speaks for itself and I think one could use it in typesetting poems, for example, to mark stanzas or as a substitute for the regular space.In my opinion, the annotation “= midpoint (in typography)” for the 00B7 Since two of the four symbols, which are subject of the discussion, are placed in Unicode Blocks named “punctuation” (see below), I would advise against using them in mathematical context.
#HOW TO TYPE A CIRCLE WITH A DOT IN THE MIDDLE FREE#
(If there are other examples I left out, feel free to edit the question and add them.)Īs the Unicode project seeks to determine the semantics of the glyphs rather than their graphical representation, this question is quite interesting.Īlthough I agree that all of these “bullets” could theoretically look the same (and one wouldn’t need to care about this issue at all), the semantic background can-at least to some degree-be inferred by the official Unicode charts: Of course it's pedantic, they all look the same, and the meaning can always be assumed from context, but I'd like to know, once and for all, which Unicode/HTML and LaTeX characters are semantically correct in each application?
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