<s>
In	O
algebraic	O
geometry	O
,	O
Jouanolou	B-Algorithm
's	I-Algorithm
trick	I-Algorithm
is	O
a	O
theorem	O
that	O
asserts	O
,	O
for	O
an	O
algebraic	O
variety	O
X	O
,	O
the	O
existence	O
of	O
a	O
surjection	B-Algorithm
with	O
affine	O
fibers	B-Algorithm
from	O
an	O
affine	O
variety	O
W	O
to	O
X	O
.	O
</s>
<s>
By	O
the	O
definition	O
of	O
a	O
torsor	O
,	O
W	O
comes	O
with	O
a	O
surjective	B-Algorithm
map	I-Algorithm
to	O
X	O
and	O
is	O
Zariski-locally	O
on	O
X	O
an	O
affine	O
space	O
bundle	O
.	O
</s>
