Liu, Y., Jiang, B., Hou, L., Tao, X., Wan, P., Lin, Z., & Fang, C. (2026). ORCA: The Annealed Spectral Conditioning Optimizer for Faster, Better LLM Training. https://omanscience.com/en/articles/orca-the-annealed-spectral-conditioning-optimizer-for-faster-better-llm-training