Fix issue tranleduy2000#84: Permutation result is not right

PAUL-Zf · Apr 18, 2021 · 4f49d51 · 4f49d51
1 parent e2406a1
commit 4f49d51
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/app/src/main/java/com/duy/calculator/symja/activities/PermutationActivity.java b/app/src/main/java/com/duy/calculator/symja/activities/PermutationActivity.java
@@ -158,7 +158,7 @@ public ArrayList<String> execute(String input) {
                 if (type == TYPE_PERMUTATION) {
                     // ( Gamma(#+1) / Gamm(#2+1) )&
                     function = F.Function( //
-                              F.Divide(F.Gamma(F.Plus(F.C1,F.Slot1)),F.Gamma(F.Plus(F.C1,F.Slot2))) //
+                            F.Divide(F.Gamma(F.Plus(F.C1,F.Slot1)),F.Gamma(F.Subtract(F.Plus(F.C3, F.Slot1),F.Plus(F.C2,F.Slot2))))//
                     );
                 }
                 String fraction = MathEvaluator.getInstance().evaluateWithResultAsTex(