Conjecture on Fibonacci-numeration P-positions of Wythoff star

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Let FnF_n denote the Fibonacci numbers, and let (Ai,Bi)(A_i,B_i) be the pairs occurring in Theorem 2. For all ne3ne 3 and every ii such that the stated inequalities hold, the following positions are PP-positions:

Ai+Bi≤F2n−4A_i+B_i\le F_{2n-4}

implies

(F2n−1,F2n−1−Ai−Bi),(F_{2n-1},F_{2n}-1-A_i-B_i),

and

Ai≤F2n−4A_i\le F_{2n-4}

implies

(F2n−1+Ai,F2n−1).(F_{2n-1}+A_i,F_{2n}-1).

Conjecture on Fibonacci-numeration P-positions. For all n≥3n\ge 3 and all ii satisfying these conditions, both displayed positions are PP-positions of the game under consideration. This would extend the preceding characterization of Wythoff-star positions by similar methods; the source provides no resolution.

References

Primary source

Urban Larsson, “The -operator and Invariant Subtraction Games”, arXiv:1009.4220 (2010).

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