From d5725d770e7af0871a3d122e69ca60eaa115aadf Mon Sep 17 00:00:00 2001
From: Dave Pagurek <davepagurek@gmail.com>
Date: Fri, 12 May 2023 22:31:07 -0400
Subject: [PATCH] Fix pow() derivative

---
 src/arithmetic.ts | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/arithmetic.ts b/src/arithmetic.ts
index 122f2c7..4333cc6 100644
--- a/src/arithmetic.ts
+++ b/src/arithmetic.ts
@@ -45,7 +45,7 @@ export class Pow extends Op {
   derivative(param: Param) {
     const [a, b] = this.dependsOn
     if (b.isConst()) {
-      return `${b.ref()}*pow(${a.ref()},${b.ref()}-1.0)`
+      return `${b.ref()}*pow(${a.ref()},${b.ref()}-1.0)*${a.derivRef(param)}`
     } else if (a.isConst()) {
       return `pow(${a.ref()},${b.ref()})*log(${a.ref()})*${b.derivRef(param)}`
     } else {