[LyX/master] Add support for \bigtimes

[Enrico Forestieri]

commit c1e38c4f6ceb973f3ca66a2fb9cbd8382d23968d
Author: Enrico Forestieri <forenr at lyx.org>
Date:   Thu Feb 4 23:20:01 2021 +0100

    Add support for \bigtimes
    
    Fixes #11223
---
 lib/symbols |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)

diff --git a/lib/symbols b/lib/symbols
index 31491dc..2e097e7 100644
--- a/lib/symbols
+++ b/lib/symbols
@@ -1126,6 +1126,7 @@ pod                lyxblacktext  0   0 func     x  x     amsmath
 # mathtools.sty
 vcentcolon         cmr          58  58    mathrel :  :          mathtools
 ordinarycolon      cmr          58  58    mathrel :  :          mathtools
+\def\bigtimes{\mathop{\diagup\kern-16mu\diagdown}} mathtools
 \def\dblcolon{\vcentcolon\mathrel{\kern-0.9mu}\vcentcolon}      mathrel ::          ::          mathtools
 \def\coloneqq{\vcentcolon\mathrel{\kern-1.2mu}=}                mathrel ≔   &#x2254;    mathtools
 \def\Coloneqq{\dblcolon\mathrel{\kern-1.2mu}=}                  mathrel ⩴    &#x2A74;    mathtools