Scope
Chapter “The admissibility frontier”, section “name the coordinates before reading the signs”. This is assertion 1 of 3 in that section.
Expanded claim page · assertion 1 of 3
A stated candidate class or identification has been ruled out under explicit assumptions. checks assumptions, certificates, counterexamples and stopping rules.
Exact assertion
The triangle has two different kinds of content. Positivity, rank and determinant sign describe whether the joint response exists independently of an invertible change of source coordinates. The signs assigned to particular edges describe that response only after those coordinates have been named and held fixed.
A specified candidate class fails under explicit assumptions. The conclusion does not automatically extend to mechanisms outside that class.
Chapter “The admissibility frontier”, section “name the coordinates before reading the signs”. This is assertion 1 of 3 in that section.
Check the assumptions defining the ruled-out candidate class; the no-go does not automatically extend beyond that class.
checks assumptions, certificates, counterexamples and stopping rules.
Break one of the no-go assumptions in a controlled construction, or show that the alleged obstruction does not follow within its stated class.
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