From 21d246db248d4c6e3e604813c818896c1461fb62 Mon Sep 17 00:00:00 2001
From: FHoltorf <32248677+FHoltorf@users.noreply.github.com>
Date: Tue, 26 Sep 2023 17:44:36 -0400
Subject: [PATCH] improve comment

---
 src/trustRegion.jl | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/src/trustRegion.jl b/src/trustRegion.jl
index 565fd3db9..902517769 100644
--- a/src/trustRegion.jl
+++ b/src/trustRegion.jl
@@ -329,7 +329,9 @@ function perform_step!(cache::TrustRegionCache{true})
         cache.stats.njacs += 1
     end
 
-    linres = dolinsolve(alg.precs, linsolve, A = J, b = _vec(fu), # cache.H, b = _vec(cache.g),
+    # do not use A = cache.H, b = _vec(cache.g) since it is equivalent 
+    # to  A = cache.J, b = _vec(fu) as long as the Jacobian is non-singular
+    linres = dolinsolve(alg.precs, linsolve, A = J, b = _vec(fu), 
         linu = _vec(u_tmp),
         p = p, reltol = cache.abstol)
     cache.linsolve = linres.cache