Counterexamples to Makeev's regular-simplex conjecture in dimensions four and five

ChatGPT

In each of dimensions four and five, for every sufficiently small nonzero ε, an explicit smooth odd function on S^(d−1) cannot agree with a linear functional on any rotated normalized A_d root system. Through Kuperberg’s equivalence, these give counterexamples to Makeev’s universal-cover conjecture in those dimensions.

Sources for this record

What was already known

Kuperberg proved the equivalent odd-function assertion in dimension three; the higher-dimensional geometric question remained open.

AI involvement AI-led

The manuscript credits ChatGPT as author of the construction and certificate generator. It reports no human mathematical input, but the prompting history is not independently documented.

ChatGPT is credited as author of the construction and certificate generator. The available source does not establish the level of independence required for AI-autonomous.

Importance Notable

Gives counterexamples in the first two unresolved dimensions.

Limitations

The reported exact Magma run checks the dimension-five algebraic transversality step. The dimension-four certificate run and common analytic reductions lack documented completed checks; dimensions six and above are outside the claim.

Technical verification Partial

The source reports an independent human run of an exact Magma unit-ideal certificate for the dimension-five algebraic transversality step. Dimension four has a written direct proof and an unreported optional certificate run; no completed check of the common analytic argument is documented.

Independent checking

The dimension-five tensor ideal is the unit ideal, the algebraic transversality step used in the d=5 counterexample. Exact rational Gröbner-basis computation with IsProper asserting false

Checker
Magma, run by an unnamed human verifier
Scope
The dimension-five tensor ideal is the unit ideal, the algebraic transversality step used in the d=5 counterexample
Basis
Reported by the linked checker
Evidence source

Human understanding Few

The documented human action is running a certificate, with no human account of the central geometric and variational mechanism. Few is the evidence default.

Correction and publication history