Add 324 construction to skew hadamard function

sagemath · Jan 11, 2023 · 553a8d4 · 553a8d4
1 parent 4b852c2
commit 553a8d4
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/sage/combinat/matrices/hadamard_matrix.py b/src/sage/combinat/matrices/hadamard_matrix.py
@@ -2232,6 +2232,10 @@ def true():
         if existence:
             return true()
         M = matrix([1])
+    elif n == 324:
+        if existence:
+            return true()
+        M = skew_hadamard_matrix_324()
     elif is_prime_power(n - 1) and ((n - 1) % 4 == 3):
         if existence:
             return true()