<s>
Here	O
is	O
the	O
-th	O
symmetric	O
power	O
of	O
,	O
i.e.	O
,	O
the	O
quotient	O
of	O
by	O
the	O
action	O
of	O
the	O
symmetric	B-Algorithm
group	I-Algorithm
,	O
and	O
is	O
the	O
class	O
of	O
in	O
the	O
ring	O
of	O
motives	O
(	O
see	O
below	O
)	O
.	O
</s>
<s>
The	O
universal	O
motivic	O
measure	O
gives	O
rise	O
to	O
the	O
motivic	B-Algorithm
zeta	I-Algorithm
function	I-Algorithm
.	O
</s>
<s>
Thus	O
,	O
in	O
this	O
case	O
,	O
the	O
motivic	B-Algorithm
zeta	I-Algorithm
function	I-Algorithm
is	O
rational	O
.	O
</s>
<s>
In	O
higher	O
dimension	O
,	O
the	O
motivic	B-Algorithm
zeta	I-Algorithm
function	I-Algorithm
is	O
not	O
always	O
rational	O
.	O
</s>
