On Sun, Apr 19, 2020 at 7:41 AM Bert Henry wrote:
>
>
> wow, I didn‘t expect, that may „simple“ problem needs such deep math. I will
> look for the math of polyhedrons to understand, what you wrote, because in
> some number-crosswords (I don‘t know the correct english word) you search for
>
wow, I didn‘t expect, that may „simple“ problem needs such deep math. I
will look for the math of polyhedrons to understand, what you wrote,
because in some number-crosswords (I don‘t know the correct english word)
you search for solutions of the m entioned type. Also you need it in some
Matthias is hinting at a possible reformulation
of the problem as finding integral points in a
polyhedron. Let me expand.
In RR^2, consider the set S of all (x, y) satisfying:
x >= 1
x <= 9
y >= 1
y <= 9
x + y = 15
or if one prefers,
-1 + x >= 0
