From 32cf735be587b7cd78e28af0c765bdbea27c7003 Mon Sep 17 00:00:00 2001
From: FHoltorf <32248677+FHoltorf@users.noreply.github.com>
Date: Wed, 27 Sep 2023 14:08:20 -0400
Subject: [PATCH] convergence check for NocedalWright

---
 src/trustRegion.jl | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/trustRegion.jl b/src/trustRegion.jl
index 4f85760e6..124c887b2 100644
--- a/src/trustRegion.jl
+++ b/src/trustRegion.jl
@@ -476,6 +476,11 @@ function trust_region_step!(cache::TrustRegionCache)
             cache.trust_r = min(2 * cache.trust_r, cache.max_trust_r)
         end
 
+        # convergence test
+        if iszero(cache.fu) || cache.internalnorm(cache.fu) < cache.abstol
+            cache.force_stop = true
+        end
+        
     elseif radius_update_scheme === RadiusUpdateSchemes.Hei
         if r > cache.step_threshold
             take_step!(cache)