<s>
Posynomials	B-Algorithm
are	O
closed	O
under	O
addition	O
,	O
multiplication	O
,	O
and	O
nonnegative	O
scaling	O
.	O
</s>
<s>
is	O
a	O
posynomial	B-Algorithm
.	O
</s>
<s>
Posynomials	B-Algorithm
are	O
not	O
the	O
same	O
as	O
polynomials	O
in	O
several	O
independent	O
variables	O
.	O
</s>
<s>
A	O
polynomial	O
's	O
exponents	O
must	O
be	O
non-negative	O
integers	O
,	O
but	O
its	O
independent	O
variables	O
and	O
coefficients	O
can	O
be	O
arbitrary	O
real	O
numbers	O
;	O
on	O
the	O
other	O
hand	O
,	O
a	O
posynomial	B-Algorithm
's	O
exponents	O
can	O
be	O
arbitrary	O
real	O
numbers	O
,	O
but	O
its	O
independent	O
variables	O
and	O
coefficients	O
must	O
be	O
positive	O
real	O
numbers	O
.	O
</s>
<s>
Posynomials	B-Algorithm
are	O
a	O
special	O
case	O
of	O
signomials	B-Algorithm
,	O
the	O
latter	O
not	O
having	O
the	O
restriction	O
that	O
the	O
be	O
positive	O
.	O
</s>
