Merge pull request #2910 from ken-nakanishi/fix-bug-dependent-on-glib…

…c-version Fix a bug dependent on glibc version
chainer · Jul 3, 2017 · f778e43 · f778e43
2 parents c77d993 + b3698f0
commit f778e43
Showing 1 changed file with 4 additions and 4 deletions.
diff --git a/chainer/optimizers/adam.py b/chainer/optimizers/adam.py
@@ -76,8 +76,8 @@ def update_core_gpu(self, param):
 
     @property
     def lr(self):
-        fix1 = 1. - self.hyperparam.beta1 ** self.t
-        fix2 = 1. - self.hyperparam.beta2 ** self.t
+        fix1 = 1. - math.pow(self.hyperparam.beta1, self.t)
+        fix2 = 1. - math.pow(self.hyperparam.beta2, self.t)
         return self.hyperparam.alpha * math.sqrt(fix2) / fix1
 
 
@@ -116,6 +116,6 @@ def create_update_rule(self):
 
     @property
     def lr(self):
-        fix1 = 1. - self.hyperparam.beta1 ** self.t
-        fix2 = 1. - self.hyperparam.beta2 ** self.t
+        fix1 = 1. - math.pow(self.hyperparam.beta1, self.t)
+        fix2 = 1. - math.pow(self.hyperparam.beta2, self.t)
         return self.hyperparam.alpha * math.sqrt(fix2) / fix1