Combination of \oplus and \otimes?

Question

I've searched the usual places (http://tug.ctan.org/info/symbols/comprehensive/symbols-a4.pdf, http://ctan.math.utah.edu/ctan/tex-archive/macros/latex/contrib/unicode-math/unimath-symbols.pdf, DeTeXify) and can't seem to find this character, which surprises me. I'd like a combination of \oplus and \otimes. More precisely, I'd like a circle subdivided into eight 45° sectors. (Sort of like \circledast but with the arms of the asterisk extending all the way out to the edge of the circle.)

Does such a symbol exist? If not, how can I create one?

what does this symbol mean? if it is generally "accepted", it should be a candidate for unicode, and i am in a position to submit it, if adequate documentation can be provided. (some of the history of the project is given in How many LaTeX characters have Unicode equivalents, and which characters and mathematical character combinations cannot be represented by Unicode? though that is not a duplicate of this question.) — barbara beeton, Feb 22 '17 at 01:25
@barbarabeeton it does not have a generally accepted meaning so probably should not be included in Unicode. My own use of it is idiosyncratic -- but FWIW, I want to use it in some elementary group theory notes to denote a binary operator without biasing the notation towards either multiplicative intuitions or additive ones. — mweiss, Feb 22 '17 at 02:19
As mentioned in this answer, this is in the Comprehensive LaTeX Symbol List as \BPwheel from linearb. — Werner, Feb 22 '17 at 06:30

score 10 · Answer 1 · edited Apr 13 '17 at 12:35

10

Easy \ooalign. ;-) See \subseteq + \circ as a single symbol ("open subset") for a quick course on it.

\documentclass{article}

\makeatletter
\DeclareRobustCommand{\oplustimes}{%
  \mathbin{\mathpalette\o@plus@times\relax}%
}
\newcommand{\o@plus@times}[2]{%
  \ooalign{$\m@th#1\oplus$\cr$\m@th#1\otimes$\cr}%
}
\makeatother

\begin{document}

$X\oplustimes Y_{a\oplustimes b}$

\end{document}

edited Apr 13 '17 at 12:35

Community

1

answered Feb 21 '17 at 22:49

egreg

1,121,712

+1 for not having forgotten, this time, the style argument… :o) – GuM Feb 21 '17 at 23:38
3

I think the symbol should be called, simply, \pizzapie. – Steven B. Segletes Feb 22 '17 at 01:52

JPi · Answer 2 · 2017-02-22T13:29:27.953

8

@Egreg did a great job reinventing the wheel ;-). An alternative:

\documentclass{article}

\usepackage{linearb}

\newcommand{\ugh}{\mathbin{\textlinb{\BPwheel}}}
\newcommand{\sugh}{\mathbin{\textlinb{\scriptsize\BPwheel}}}

\begin{document}

$X \ugh Y_{a \sugh b}$

\end{document}

edited Feb 22 '17 at 13:29

answered Feb 22 '17 at 01:51

JPi

13,595

1

It is in the comprehensive latex symbols list...... – JPi Feb 22 '17 at 02:25
1

+1. You forgot to make \ugh be of type \mathbin, though. ;-) – Mico Feb 22 '17 at 05:19

Combination of \oplus and \otimes?

2 Answers2