<s>
SageManifolds	O
(	O
following	O
styling	O
of	O
SageMath	B-Application
)	O
is	O
an	O
extension	O
fully	O
integrated	O
into	O
SageMath	B-Application
,	O
to	O
be	O
used	O
as	O
a	O
package	B-Application
for	O
differential	B-Language
geometry	I-Language
and	O
tensor	O
calculus	O
.	O
</s>
<s>
It	O
can	O
be	O
used	O
on	O
CoCalc	B-Application
.	O
</s>
<s>
An	O
important	O
class	O
of	O
treated	O
manifolds	O
is	O
that	O
of	O
pseudo-Riemannian	O
manifolds	O
,	O
among	O
which	O
Riemannian	B-Architecture
manifolds	I-Architecture
and	O
Lorentzian	O
manifolds	O
,	O
with	O
applications	O
to	O
General	O
Relativity	O
.	O
</s>
<s>
New	O
methods	O
in	O
each	O
class.0.324	O
November	O
2013Development	O
repository	O
moved	O
from	O
svn	B-Application
to	O
git	B-Application
.	O
</s>
<s>
More	O
classes	O
and	O
methods	O
(	O
some	O
inherited	O
from	O
Sage	O
)	O
.0.410	O
February	O
2014New	O
classes	O
,	O
members	O
,	O
and	O
methods.0.512	O
July	O
2014This	O
is	O
a	O
major	O
release	O
,	O
involving	O
the	O
introduction	O
of	O
algebraic	O
structures	O
to	O
describe	O
tensor	O
fields	O
,	O
namely	O
modules	O
over	O
the	O
algebra	O
of	O
scalar	O
fields	O
,	O
among	O
which	O
free	B-Application
modules	O
of	O
finite	O
rank	O
.	O
</s>
<s>
the	O
introduction	O
of	O
homomorphisms	O
between	O
free	B-Application
modules0.816	O
May	O
2015Changes	O
for	O
the	O
end	O
user	O
:	O
</s>
<s>
Nice	O
display	O
of	O
chart	O
transition	O
maps	O
:	O
new	O
method	O
CoordChange.display( )	O
0.910	O
December	O
2015This	O
is	O
a	O
major	O
release	O
,	O
resulting	O
from	O
an	O
important	O
refactoring	O
of	O
the	O
code	O
,	O
in	O
view	O
of	O
a	O
full	O
integration	O
of	O
SageManifolds	O
into	O
SageMath	B-Application
(	O
cf	O
.	O
</s>
<s>
the	O
metaticket	O
#18528	O
on	O
the	O
SageMath	B-Application
developer	O
trac	O
)	O
.	O
</s>
<s>
This	O
release	O
propagates	O
further	O
code	O
changes	O
related	O
to	O
the	O
integration	O
of	O
SageManifolds	O
into	O
SageMath	B-Application
(	O
cf	O
.	O
</s>
<s>
Some	O
changes	O
to	O
prepare	O
the	O
migration	O
to	O
Python	B-Language
3	O
(	O
e.g.	O
</s>
<s>
print	O
replaced	O
by	O
print( )	O
)	O
1.011	O
January	O
2017Besides	O
the	O
full	O
integration	O
in	O
SageMath	B-Application
7.5	O
,	O
there	O
are	O
only	O
minor	O
changes	O
with	O
respect	O
to	O
v0.9.1	O
:	O
</s>
<s>
Systematic	O
use	O
of	O
Python3-compatible	O
syntax	O
(	O
to	O
prepare	O
the	O
migration	O
of	O
SageMath	B-Application
to	O
Python3	B-Language
)	O
;	O
in	O
particular	O
:	O
</s>
<s>
As	O
SageMath	B-Application
is	O
,	O
SageManifolds	O
is	O
a	O
free	B-Application
and	I-Application
open	I-Application
source	I-Application
software	I-Application
based	O
on	O
the	O
Python	B-Language
programming	I-Language
language	I-Language
.	O
</s>
<s>
It	O
is	O
released	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
It	O
is	O
more	O
specifically	O
(	O
meaning	O
that	O
a	O
user	O
may	O
elect	O
to	O
use	O
a	O
licence	O
higher	O
than	O
GPL	B-License
version	O
2	O
.	O
)	O
</s>
