Take the set X equal to A for i=7, equal to B for i=8 and equal to
for other i.
We define the set Y of indices the following way: Take a positive number j less or equal to 32768, let
j-1=16*u+v
with v less than 16. Assume first that v is less than 8. Then j is an element of Y, if and
only if
(A with index j)
is included in X.
Assume that v is bigger or equal to 8. Then j is an element of Y, if and
only if
(A with index j)
is not included in X.
We define
Take the numbers ti associated with Bi according to the page
Part 65537-3.
Using arguments that we used many times, we can derive the formulas:
We can create now quadratic equations, the way we were doing it before, with roots si and ti. We'll write
formulas for roots, but before we introduce new notations:
Notation
Value
Now we can write
Formulas are becoming complicated and new ideas are needed to write them.