Manuscript XII-A@2 · XII-A-v2.tex · theorem · 955d4b22
Theorem: Ordering-independent exclusion
Robust observation exclusion › Explicit predecessor input · lines 1623–1646 · proof included or linked
XII-A@2#thm:exclusion
Let and . Then . No classical-symbol coefficient of an element of equals , and the same holds for every admissible . If , then . Universal admission for all observations is excluded.
Proof. The first assertion is Input theorem input:XIG(b). Every classical-symbol coefficient belongs to , proving the second. The underlying quotient vector space is the same for ; also is the identity modulo . Either fact proves ordering independence. If belonged to the vector space , their difference would belong to it. Input theorem input:XIG(a) supplies excluded observations for every frozen admissible data set, ruling out universal admission into this carrier.