<s>
Theano	B-Algorithm
is	O
a	O
Python	B-Language
library	B-Library
and	O
optimizing	O
compiler	B-Language
for	O
manipulating	O
and	O
evaluating	O
mathematical	O
expressions	O
,	O
especially	O
matrix-valued	O
ones	O
.	O
</s>
<s>
In	O
Theano	B-Algorithm
,	O
computations	O
are	O
expressed	O
using	O
a	O
NumPy-esque	O
syntax	O
and	O
compiled	B-Language
to	O
run	O
efficiently	O
on	O
either	O
CPU	O
or	O
GPU	B-Architecture
architectures	O
.	O
</s>
<s>
Theano	B-Algorithm
is	O
an	O
open	B-License
source	I-License
project	O
primarily	O
developed	O
by	O
the	O
Montreal	O
Institute	O
for	O
Learning	O
Algorithms	O
(	O
MILA	O
)	O
at	O
the	O
Université	O
de	O
Montréal	O
.	O
</s>
<s>
The	O
name	O
of	O
the	O
software	O
references	O
the	O
ancient	O
philosopher	O
Theano	B-Algorithm
,	O
long	O
associated	O
with	O
the	O
development	O
of	O
the	O
golden	O
mean	O
.	O
</s>
<s>
Theano	B-Algorithm
1.0.0	O
was	O
then	O
released	O
on	O
15	O
November	O
2017	O
.	O
</s>
<s>
On	O
17	O
May	O
2018	O
,	O
Chris	O
Fonnesbeck	O
wrote	O
on	O
behalf	O
of	O
the	O
PyMC	B-Application
development	O
team	O
that	O
the	O
PyMC	B-Application
developers	O
will	O
officially	O
assume	O
control	O
of	O
Theano	B-Algorithm
maintenance	O
once	O
they	O
step	O
down	O
.	O
</s>
<s>
On	O
29	O
January	O
2021	O
,	O
they	O
started	O
using	O
the	O
name	O
for	O
their	O
fork	O
of	O
Theano	B-Algorithm
.	O
</s>
<s>
The	O
following	O
code	O
is	O
the	O
original	O
Theano	B-Algorithm
's	O
example	O
.	O
</s>
<s>
It	O
defines	O
a	O
computational	O
graph	O
with	O
2	O
scalars	O
and	O
of	O
type	O
double	O
and	O
an	O
operation	O
between	O
them	O
(	O
addition	O
)	O
and	O
then	O
creates	O
a	O
Python	B-Language
function	O
f	O
that	O
does	O
the	O
actual	O
computation	O
.	O
</s>
