Is there a pair of symbols in some package which appear as $\boxtimes$, but each without one diagonal?

If not, what is the best way to render such a symbol? (To be completely explicit, I'm looking for symbols which are a square plus either diagonal.)

Detexify doesn't come up with anything; the only idea I have is to somehow overlay a diagonal line with $\square$, but I'm also not sure what a good way is to do that.

3 Answers 3


They are in mathabx package:

\verb|\boxbackslash|: $\boxbackslash$ 

\verb|\boxslash|: $\boxslash$

enter image description here

Pay attention: mathabx changes the shape of all symbols.

  • 1
    With the usual warning that mathabx changes the shape of all symbols.
    – egreg
    Sep 16, 2021 at 9:30
  • @egreg Warning added
    – CarLaTeX
    Sep 16, 2021 at 10:24

mathabx introduces some extra trouble as egreg mentioned, so here is a way to "steal" directly the symbol without using a family.


\genmathchar {\boxslash}     {"6D} {\mathbin} {\twelvemathb} {\eightmathb} {\sixmathb}
\genmathchar {\boxbackslash} {"6E} {\mathbin} {\twelvemathb} {\eightmathb} {\sixmathb}

$ P \boxslash Q \boxbackslash R $



From the link suggest by the user @Steven B. Segletes, I add my MWE importing just only two symbols, from the specific slot into this link:


Here you can see the slots to take only two request symbols. All the others symbol are of amssmymb.


      <5> <6> <7> <8> <9> <10> gen * mathb
      <10.95> mathb10 <12> <14.4> <17.28> <20.74> <24.88> mathb12
\DeclareMathSymbol{\boxslash}{2}{mathb}{"6D}%%%%%% imported only two symbol of mathabx; here there are the slot of this package: https://mirror.las.iastate.edu/tex-archive/fonts/mathabx/texinputs/mathabx.dcl

$a\boxslash \triangle \cup \cap \square BCD$ and $acfh \boxbackslash \sum \triangle \cup \cap BCD$ 

enter image description here

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