<s>
The	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
is	O
the	O
set	O
of	O
all	O
that	O
are	O
related	O
to	O
:	O
</s>
<s>
The	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
is	O
the	O
set	O
of	O
all	O
such	O
that	O
is	O
related	O
to	O
them	O
:	O
</s>
<s>
The	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
is	O
the	O
set	O
of	O
all	O
that	O
are	O
related	O
to	O
without	O
being	O
in	O
this	O
way	O
related	O
to	O
any	O
of	O
them	O
:	O
</s>
<s>
The	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
is	O
the	O
set	O
of	O
all	O
such	O
that	O
is	O
related	O
to	O
them	O
without	O
any	O
of	O
them	O
being	O
in	O
this	O
way	O
related	O
to	O
:	O
</s>
<s>
Consider	O
a	O
real	O
number	O
,	O
and	O
the	O
relation	B-Algorithm
.	O
</s>
<s>
the	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
numbers	O
that	O
were	O
greater	O
than	O
or	O
equal	O
to	O
,	O
</s>
<s>
the	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
numbers	O
that	O
were	O
greater	O
than	O
,	O
</s>
<s>
the	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
numbers	O
that	O
were	O
less	O
than	O
.	O
</s>
<s>
the	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
,	O
</s>
<s>
the	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
,	O
</s>
<s>
the	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
.	O
</s>
<s>
In	O
economics	O
,	O
the	O
set	O
could	O
be	O
interpreted	O
as	O
a	O
set	O
of	O
goods	O
and	O
services	O
or	O
of	O
possible	O
outcomes	O
,	O
the	O
relation	B-Algorithm
as	O
strict	O
preference	O
,	O
and	O
the	O
relationship	O
as	O
weak	O
preference	O
.	O
</s>
<s>
the	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
,	O
or	O
better	O
set	O
,	O
of	O
would	O
be	O
the	O
set	O
of	O
all	O
goods	O
,	O
services	O
,	O
or	O
outcomes	O
that	O
were	O
at	O
least	O
as	O
desired	O
as	O
,	O
</s>
<s>
the	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
goods	O
,	O
services	O
,	O
or	O
outcomes	O
that	O
were	O
more	O
desired	O
than	O
,	O
</s>
<s>
the	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
goods	O
,	O
services	O
,	O
or	O
outcomes	O
that	O
were	O
less	O
desired	O
than	O
.	O
</s>
<s>
the	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
,	O
</s>
<s>
the	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
,	O
</s>
<s>
the	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
of	O
would	O
be	O
the	O
set	O
of	O
all	O
such	O
that	O
.	O
</s>
<s>
On	O
the	O
assumption	O
that	O
is	O
a	O
total	O
ordering	O
of	O
,	O
the	O
complement	O
of	O
the	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
is	O
the	O
strict	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
.	O
</s>
<s>
and	O
the	O
complement	O
of	O
the	O
strict	O
upper	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
is	O
the	O
lower	B-Algorithm
contour	I-Algorithm
set	I-Algorithm
.	O
</s>
