The name is absent



10

The geometric context of the next theorem can be easily understood in two
dimension.

Theorem 3.5 Exclusion Theorem

Let a simplex P be given in standard form with the additional condition that
ff1≠i
t¾aa holds for all i = 1,    , n. Then the Labeling Rule precludes the

possibility of the coexistence of a completely labeled simplex of type I and a com-
pletely labeled simplex of type II. If P contains an integral point, then there exists
no completely labeled simplex of type II.

Proof: We only need to consider the case in which P contains an integral point,
say æ0, i.e.,
Ax0 ≤ b. Let us suppose to the contrary that there is a completely
labeled simplex of type
II, say σ(⅛1,π) with vertices x1, ■■■, xn+1, where π =
(τr(l), ∙ ∙ ∙ ,
π(n ⅛ 1)) is a permutation of the n ⅛ 1 elments of N, and

xt+1 = xt ⅛ q(π(if), i = 1, ∙ ∙ ∙ , n;

x1 = xn+1 + q(π(n + 1)).

Now it is easy to see that there exist nonnegative integers k^, ∙ ∙ ∙, such that

x1 = x° + ∑ k⅛(i),
ieN

and

min kl = 0.
heN n

Let

I = argmin{ π 1(∕z) ∣ kjl = max: k1j

Then there exist nonnegative integers kt1, - , ktn+1 such that

xt = x0 + ∑ ktjq(f)
j
N



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