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authorEric Gourgoulhon <eric.gourgoulhon@obspm.fr>2015-06-18 18:15:25 +0200
committerEric Gourgoulhon <eric.gourgoulhon@obspm.fr>2015-06-18 18:15:25 +0200
commit6289514bcdc8ee9a62d75acb53d6bbe96c1a88a4 (patch)
treecb570c61c61b564f63973ac8c5b031038baa526a
parentAdd doctests to TopManifoldHomset and ContinuousMap (diff)
Remove unnecessary import in chart.py
-rw-r--r--src/sage/manifolds/chart.py4
1 files changed, 1 insertions, 3 deletions
diff --git a/src/sage/manifolds/chart.py b/src/sage/manifolds/chart.py
index 97561b7..23255b3 100644
--- a/src/sage/manifolds/chart.py
+++ b/src/sage/manifolds/chart.py
@@ -352,7 +352,6 @@ class Chart(UniqueRepresentation, SageObject):
xx_list.append(coord_var)
self._xx = tuple(xx_list)
-
def _repr_(self):
r"""
String representation of the object.
@@ -1968,7 +1967,6 @@ class CoordChange(SageObject):
Chart (M, (u, v))): Change of coordinates from Chart (M, (x, y)) to Chart (M, (u, v))}
"""
- from sage.symbolic.ring import SR
from sage.symbolic.relation import solve
from sage.manifolds.utilities import simplify_chain_real, \
simplify_chain_generic
@@ -2019,7 +2017,7 @@ class CoordChange(SageObject):
list_x2_to_x1 = []
for sol in solutions:
if x2[0] in sol:
- raise ValueError("(he system could not be solved; use " +
+ raise ValueError("the system could not be solved; use " +
"set_inverse() to set the inverse " +
"manually")
x2_to_x1 = [sol[x1[i]].subs(substitutions) for i in range(n1)]