From d5557036514ff1be85315d5dd5deac44ebedab98 Mon Sep 17 00:00:00 2001
From: Kamila Szewczyk <kspalaiologos@gmail.com>
Date: Sat, 4 Mar 2023 22:16:38 +0100
Subject: [PATCH] matrix:det - simplify vars

---
 .../java/palaiologos/kamilalisp/runtime/cas/MatrixDet.java   | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/main/java/palaiologos/kamilalisp/runtime/cas/MatrixDet.java b/src/main/java/palaiologos/kamilalisp/runtime/cas/MatrixDet.java
index 1991567d..56244f1c 100644
--- a/src/main/java/palaiologos/kamilalisp/runtime/cas/MatrixDet.java
+++ b/src/main/java/palaiologos/kamilalisp/runtime/cas/MatrixDet.java
@@ -50,7 +50,10 @@ public Atom apply(Environment env, List<Atom> args) {
             detData.add(L[i][i].getUserdata(MathExpression.class).getData());
             detData.add(U[i][i].getUserdata(MathExpression.class).getData());
         }
-        return new Atom(new MathExpression(env, vars, new Atom(detData)).simplify(env));
+        LinkedHashSet<String> hs = new LinkedHashSet<>();
+        Atom dd = new Atom(detData);
+        MathExpression.unknownsFrom(dd, hs);
+        return new Atom(new MathExpression(env, hs, dd).simplify(env));
     }
 
     @Override