Add \gt and \lt

src/delimiter.js

@@ -339,7 +339,7 @@ var stackAlwaysDelimiters = [
 
 // and delimiters that never stack
 var stackNeverDelimiters = [
-    "<", ">", "\\langle", "\\rangle", "/", "\\backslash"
+    "<", ">", "\\langle", "\\rangle", "/", "\\backslash", "\\lt", "\\gt"
 ];
 
 // Metrics of the different sizes. Found by looking at TeX's output of
@@ -352,9 +352,9 @@ var sizeToMaxHeight = [0, 1.2, 1.8, 2.4, 3.0];
  */
 var makeSizedDelim = function(delim, size, options, mode) {
     // < and > turn into \langle and \rangle in delimiters
-    if (delim === "<") {
+    if (delim === "<" || delim === "\\lt") {
         delim = "\\langle";
-    } else if (delim === ">") {
+    } else if (delim === ">" || delim === "\\gt") {
         delim = "\\rangle";
     }
 
@@ -468,9 +468,9 @@ var traverseSequence = function(delim, height, sequence, options) {
  * traverse the sequences, and create a delimiter that the sequence tells us to.
  */
 var makeCustomSizedDelim = function(delim, height, center, options, mode) {
-    if (delim === "<") {
+    if (delim === "<" || delim === "\\lt") {
         delim = "\\langle";
-    } else if (delim === ">") {
+    } else if (delim === ">" || delim === "\\gt") {
         delim = "\\rangle";
     }
 

src/functions.js

@@ -224,7 +224,7 @@ var delimiters = [
     "(", ")", "[", "\\lbrack", "]", "\\rbrack",
     "\\{", "\\lbrace", "\\}", "\\rbrace",
     "\\lfloor", "\\rfloor", "\\lceil", "\\rceil",
-    "<", ">", "\\langle", "\\rangle",
+    "<", ">", "\\langle", "\\rangle", "\\lt", "\\gt",
     "\\lvert", "\\rvert", "\\lVert", "\\rVert",
     "\\lgroup", "\\rgroup", "\\lmoustache", "\\rmoustache",
     "/", "\\backslash",

src/symbols.js

@@ -487,6 +487,7 @@ defineSymbol(math, main, rel, "\u2245", "\\cong");
 defineSymbol(math, main, rel, "\u2265", "\\ge");
 defineSymbol(math, main, rel, "\u2265", "\\geq");
 defineSymbol(math, main, rel, "\u2190", "\\gets");
+defineSymbol(math, main, rel, ">", "\\gt");
 defineSymbol(math, main, rel, "\u2208", "\\in");
 defineSymbol(math, main, rel, "\u2209", "\\notin");
 defineSymbol(math, main, rel, "\u2282", "\\subset");
@@ -499,6 +500,7 @@ defineSymbol(math, main, rel, "\u22a8", "\\models");
 defineSymbol(math, main, rel, "\u2190", "\\leftarrow");
 defineSymbol(math, main, rel, "\u2264", "\\le");
 defineSymbol(math, main, rel, "\u2264", "\\leq");
+defineSymbol(math, main, rel, "<", "\\lt");
 defineSymbol(math, main, rel, "\u2260", "\\ne");
 defineSymbol(math, main, rel, "\u2260", "\\neq");
 defineSymbol(math, main, rel, "\u2192", "\\rightarrow");

test/katex-spec.js

@@ -1752,3 +1752,12 @@ describe("A parser that does not throw on unsupported commands", function() {
         expect(parsedInput[0].value.color).toBe(errorColor);
     });
 });
+
+describe("The symbol table integraty", function() {
+    it("should treat certain symbols as synonyms", function() {
+        expect(getBuilt("<")).toEqual(getBuilt("\\lt"));
+        expect(getBuilt(">")).toEqual(getBuilt("\\gt"));
+        expect(getBuilt("\\left<\\frac{1}{x}\\right>"))
+            .toEqual(getBuilt("\\left\\lt\\frac{1}{x}\\right\\gt"));
+    });
+});