Adler's conjecture on spectra of two-cardinal counting functions
Adler's conjecture on spectra of two-cardinal counting functions
Let be a countable theory and let be the associated two-cardinal counting function for infinite cardinals . Adler's counting-spectrum conjecture. There are only finitely many possible functions as ranges over countable theories, and the property that is NTP can be detected from . If has TP, the function is maximal, namely for all . The first assertion is addressed by later results in the paper, while the second is explicitly refuted by the counterexample identified below.
Sources & referencesView supporting material
Primary source
Artem Chernikov and Chuyin Jiang, “Fractional Helly property and combinatorics of forking in NTP_2 theories”, arXiv:2605.18123 (2026).
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