<s>
In	O
mathematics	O
the	O
symmetrization	B-Algorithm
methods	I-Algorithm
are	O
algorithms	O
of	O
transforming	O
a	O
set	O
to	O
a	O
ball	O
with	O
equal	O
volume	O
and	O
centered	O
at	O
the	O
origin	O
.	O
</s>
<s>
These	O
algorithms	O
show	O
up	O
in	O
solving	O
the	O
classical	O
isoperimetric	O
inequality	O
problem	O
,	O
which	O
asks	O
:	O
Given	O
all	O
two-dimensional	O
shapes	O
of	O
a	O
given	O
area	O
,	O
which	O
of	O
them	O
has	O
the	O
minimal	O
perimeter	B-Application
(	O
for	O
details	O
see	O
Isoperimetric	O
inequality	O
)	O
.	O
</s>
