add \argmax and \argmin (#1820)

* add \argmax and \argmin

* add reference to argmin and argmax

docs/support_table.md

@@ -94,6 +94,8 @@ table td {
 |\arctan|$\arctan$||
 |\arctg|$\arctg$||
 |\arg|$\arg$||
+|\argmax|$\argmax$||
+|\argmin|$\argmin$||
 |{array}|$\begin{array}{cc}a&b\\c&d\end{array}$ | `\begin{array}{cc}`<br>&nbsp;&nbsp;&nbsp;`a & b \\`<br>&nbsp;&nbsp;&nbsp;`c & d`<br>`\end{array}`|
 |\array|<span style="color:firebrick;">Not supported</span>|see `{array}`|
 |\arraystretch|$\def\arraystretch{1.5}\begin{array}{cc}a&b\\c&d\end{array}$|`\def\arraystretch{1.5}`<br>`\begin{array}{cc}`<br>&nbsp;&nbsp;&nbsp;`a & b \\`<br>&nbsp;&nbsp;&nbsp;`c & d`<br>`\end{array}`|

docs/supported.md

@@ -360,7 +360,8 @@ Direct Input: $+ - / * ⋅ ± × ÷ ∓ ∔ ∧ ∨ ∩ ∪ ≀ ⊎ ⊓ ⊔ ⊕
 | $\cos$ `\cos` | $\exp$ `\exp`  | $\tanh$ `\tanh`| $\min$ `\min` |
 | $\cosec$ `\cosec`  | $\hom$ `\hom`  | $\tg$ `\tg`  | $\Pr$ `\Pr`  |
 | $\cosh$ `\cosh`| $\ker$ `\ker`  | $\th$ `\th`  | $\sup$ `\sup` |
-| $\cot$ `\cot` | $\lg$ `\lg`| $\operatorname{f}$ `\operatorname{f}` |
+| $\cot$ `\cot` | $\lg$ `\lg`| $\operatorname{f}$ `\operatorname{f}` | $\argmax$ `\argmax` |
+|$\argmin$ `\argmin`|
 
 Functions on the right column of this table can take `\limits`.
 

src/macros.js

@@ -876,3 +876,10 @@ defineMacro("\\thetasym", "\\vartheta");
 // TODO: defineMacro("\\varcoppa", "\\\mbox{\\coppa}");
 defineMacro("\\weierp", "\\wp");
 defineMacro("\\Zeta", "\\mathrm{Z}");
+
+//////////////////////////////////////////////////////////////////////
+// statmath.sty
+// https://ctan.math.illinois.edu/macros/latex/contrib/statmath/statmath.pdf
+
+defineMacro("\\argmin", "\\DOTSB\\mathop{\\operatorname{arg\\,min}}\\limits");
+defineMacro("\\argmax", "\\DOTSB\\mathop{\\operatorname{arg\\,max}}\\limits");

test/katex-spec.js

@@ -3140,6 +3140,14 @@ describe("A macro expander", function() {
     it("should expand \\liminf as expected", () => {
         expect`\liminf`.toParseLike`\mathop{\operatorname{lim\,inf}}\limits`;
     });
+
+    it("should expand \\argmin as expected", () => {
+        expect`\argmin`.toParseLike`\mathop{\operatorname{arg\,min}}\limits`;
+    });
+
+    it("should expand \\argmax as expected", () => {
+        expect`\argmax`.toParseLike`\mathop{\operatorname{arg\,max}}\limits`;
+    });
 });
 
 describe("\\tag support", function() {