feat(math): Support TeX-math limits

sile-typesetter · Oct 17, 2024 · 3a6d1f2 · 3a6d1f2
1 parent 3a0ef46
commit 3a6d1f2
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diff --git a/packages/math/texlike.lua b/packages/math/texlike.lua
@@ -479,6 +479,10 @@ compileToMathML(
   \def{sqrt}{\msqrt{#1}}
   \def{bi}{\mi[mathvariant=bold-italic]{#1}}
   \def{dsi}{\mi[mathvariant=double-struck]{#1}}
+  \def{lim}{\mo{lim}}
+  \def{limsup}{\mo{lim sup}}% using U+202F NARROW NO-BREAK SPACE
+  \def{liminf}{\mo{lim inf}}% using U+202F NARROW NO-BREAK SPACE
+  \def{to}{\mo[atom=bin]{→}}
 
   % Standard spaces gleaned from plain TeX
   \def{thinspace}{\mspace[width=thin]}

diff --git a/packages/math/unicode-symbols.lua b/packages/math/unicode-symbols.lua
@@ -2649,6 +2649,9 @@ symbolDefaults["]"] = { atom = atomType.closeSymbol, stretchy = true }
 symbolDefaults["{"] = { atom = atomType.openingSymbol, stretchy = true }
 symbolDefaults["}"] = { atom = atomType.closeSymbol, stretchy = true }
 symbolDefaults["mod"] = { atom = atomType.binaryOperator }
+symbolDefaults["lim"] = { atom = atomType.bigOperator }
+symbolDefaults["lim sup"] = { atom = atomType.bigOperator } -- using U+202F NARROW NO-BREAK SPACE
+symbolDefaults["lim inf"] = { atom = atomType.bigOperator } -- using U+202F NARROW NO-BREAK SPACE
 symbolDefaults["%"] = { atom = atomType.binaryOperator }
 
 return {