Extended ray class fields of orders conjecture for SICs
Fix , write with a fundamental discriminant, and let . Let satisfy the extended order-to-multiplet conjecture, and let and be the ray class fields associated with the order , with levels and respectively, where for odd and for even . Extended Ray Class Fields of Orders Conjecture. If , then and . This extends the original ray class prediction from the maximal order to every order indexing a SIC multiplet; it remains open.
References
Primary source
Gene S. Kopp and Jeffrey C. Lagarias, “SIC-POVMs and orders of real quadratic fields”, arXiv:2407.08048 (2026).
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