Closed-form expressions for all states at fixed generation (conjecture)
Prove or refute the conjecture that all open bosonic string states at fixed generation admit closed-form oscillator realizations via the authors’ generalized Regge-trajectory techniques, except for those bottom-of-trajectory states whose number of oscillator structures has not stabilized.
References
We conjecture that all states at fixed generation can be expressed in closed form using the techniques we developed, with the exception of those states lying at the bottom of generalized Regge trajectories for which the number of oscillator structures has not stabilized, and therefore do not fit the general formula for their corresponding family.
— Unraveling the Spectrum of the Open String
(2511.07524 - Bucciotti et al., 10 Nov 2025) in Section 6 (Outlook), bullet “Towards the full spectrum”