Poindexter, Donald D., Jr

An Intrinsic Formula for the Ray–West Correction Term

For a nonempty permutation β of length m, Ray and West expressed the number of length-(m+2) permutations containing β using a correction term j(β), but did not give j as a statistic intrinsic to β. This is Problem 3.7 of Vatter’s 2026 survey. This preliminary technical report pro...

An Intrinsic Formula for the Ray–West Correction Term

For a nonempty permutation β of length m, Ray and West expressed the number of length-(m+2) permutations containing β using a correction term j(β), but did not give j as a statistic intrinsic to β. This is Problem 3.7 of Vatter’s 2026 survey. This preliminary technical report pro...

The Six-Neuron Counterexample to the Target-Free Clique Conjecture Is Minimal

This record presents an exact, independently replayable computer-assisted proof that every legal combinatorial threshold-linear network (CTLN) on at most five neurons satisfies the algebraic target-free clique classification. Consequently, every nondegenerate legal CTLN on at mos...