From 4788971d54a341a26bb66971d6bc7f7c1d75656f Mon Sep 17 00:00:00 2001
From: xiaoguoguo626807 <100397923+xiaoguoguo626807@users.noreply.github.com>
Date: Tue, 15 Aug 2023 09:13:17 +0800
Subject: [PATCH] =?UTF-8?q?=E3=80=90lbfgs=E3=80=91add=20reference=20of=20l?=
 =?UTF-8?q?bfgs=20(#56194)?=
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* add reference of lbfgs

* add reference of lbfgs
---
 python/paddle/optimizer/lbfgs.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/python/paddle/optimizer/lbfgs.py b/python/paddle/optimizer/lbfgs.py
index d309e67772b..7afd59e65ad 100644
--- a/python/paddle/optimizer/lbfgs.py
+++ b/python/paddle/optimizer/lbfgs.py
@@ -143,6 +143,8 @@ def _strong_wolfe(
 
                 a_lo = aj;
         end(repeat)
+
+    reference: https://github.com/pytorch/pytorch
     """
 
     d_norm = d.abs().max()
@@ -275,7 +277,6 @@ def _strong_wolfe(
             # Armijo condition not satisfied or not lower than lowest point
             bracket[high_pos] = alpha
             bracket_f[high_pos] = loss_new
-            # bracket_g[high_pos] = grad_new.clone(memory_format=torch.contiguous_format)
             bracket_g[high_pos] = grad_new.clone()
             bracket_gtd[high_pos] = gtd_new
             low_pos, high_pos = (
-- 
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