smallmatrix LaTeX command support

Sources/SwiftMath/MathRender/MTMathAtomFactory.swift

@@ -791,7 +791,8 @@ public class MTMathAtomFactory {
         "bmatrix": ["[", "]"],
         "Bmatrix": ["{", "}"],
         "vmatrix": ["vert", "vert"],
-        "Vmatrix": ["Vert", "Vert"]
+        "Vmatrix": ["Vert", "Vert"],
+        "smallmatrix": []
     ]
     
     /** Builds a table for a given environment with the given rows. Returns a `MTMathAtom` containing the
@@ -821,17 +822,21 @@ public class MTMathAtomFactory {
         } else if let env = env {
             if let delims = matrixEnvs[env] {
                 table.environment = "matrix"
+
+                // smallmatrix uses script style and tighter spacing for inline use
+                let isSmallMatrix = (env == "smallmatrix")
+
                 table.interRowAdditionalSpacing = 0
-                table.interColumnSpacing = 18
-                
-                let style = MTMathStyle(style: .text)
-                
+                table.interColumnSpacing = isSmallMatrix ? 6 : 18
+
+                let style = MTMathStyle(style: isSmallMatrix ? .script : .text)
+
                 for i in 0..<table.cells.count {
                     for j in 0..<table.cells[i].count {
                         table.cells[i][j].insert(style, at: 0)
                     }
                 }
-                
+
                 if delims.count == 2 {
                     let inner = MTInner()
                     inner.leftBoundary = Self.boundary(forDelimiter: delims[0])

Tests/SwiftMathTests/MTMathListBuilderTests.swift

@@ -2369,15 +2369,41 @@ final class MTMathListBuilderTests: XCTestCase {
         ]
 
         for (latex, desc) in testCases {
+            print("Testing: \(desc)")
+            print("  LaTeX: \(latex)")
             var error: NSError? = nil
             let list = MTMathListBuilder.build(fromString: latex, error: &error)
 
-            if list == nil || error != nil {
-                throw XCTSkip("\\smallmatrix not implemented: \(desc). Error: \(error?.localizedDescription ?? "nil result")")
+            if let err = error {
+                print("  ERROR: \(err.localizedDescription)")
+            } else if list == nil {
+                print("  List is nil but no error")
+            } else {
+                print("  SUCCESS: Got \(list!.atoms.count) atoms")
             }
 
             let unwrappedList = try XCTUnwrap(list, "Should parse: \(desc)")
+            XCTAssertNil(error, "Should not error on \(desc): \(error?.localizedDescription ?? "")")
             XCTAssertTrue(unwrappedList.atoms.count >= 1, "\(desc) should have atoms")
+
+            // Verify we have a table structure
+            var foundTable = false
+            for atom in unwrappedList.atoms {
+                if atom.type == .table {
+                    foundTable = true
+                    break
+                }
+                // Check inside inner atoms (for matrices with delimiters)
+                if atom.type == .inner, let inner = atom as? MTInner, let innerList = inner.innerList {
+                    for innerAtom in innerList.atoms {
+                        if innerAtom.type == .table {
+                            foundTable = true
+                            break
+                        }
+                    }
+                }
+            }
+            XCTAssertTrue(foundTable, "\(desc) should contain a table structure")
         }
     }