@misc{Yang2026StrictProofNote,
  author = {Yang, Shifu},
  title = {{Strict Nonbinary Rate Bounds Beyond Optimized Classical and Mixed-Channel Envelopes}},
  howpublished = {Mathematical proof note, version 1.0},
  year = {2026},
  month = oct,
  note = {Dated October 8, 2026},
  url = {https://github.com/stalin1943/Coding-Theory-Proof-Notes/blob/main/qary-strict-rate-bounds/proof.pdf}
}