Added \notni character

SuzanneSoy · SuzanneSoy · commit 1ada465cb254 · 2017-05-17T15:07:47.000+02:00
diff --git a/src/macros.js b/src/macros.js
@@ -21,3 +21,7 @@ defineMacro("\\endgroup", "}");
 // \def\overset#1#2{\binrel@{#2}\binrel@@{\mathop{\kern\z@#2}\limits^{#1}}}
 defineMacro("\\overset", "\\mathop{#2}\\limits^{#1}");
 defineMacro("\\underset", "\\mathop{#2}\\limits_{#1}");
+
+% Present in newtxmath, pxfonts and txfonts
+defineMacro("\\notni", "\\mathrel\\bgroup\\rlap\\bgroup\\kern\\bgroup0.04em" +
+    "\\egroup/\\egroup\\bgroup\\ni\\egroup\\egroup");
