Automated merge with ssh://projects@lgcm.iro.umontreal.ca/hg/theano

theano/tensor/basic.py

@@ -590,7 +590,7 @@ class _tensor_py_operators:
         if L==float('inf'):
             raise NotImplementedError()
         #optimizations will/should catch cases like L=1, L=2
-        return pow(pow(self, L).sum(axis=axis), 1.0/L)
+        return pow(pow(abs_(self), L).sum(axis=axis), 1.0/L)
     
 
 class TensorResult(Result, _tensor_py_operators):