NuMuon: Nuclear-Norm-Constrained Muon for Compressible LLM Training. - Hadi Mohaghegh Dolatabadi; Thalaiyasingam Ajanthan; Sameera Ramasinghe; Chamin Hewa Koneputugodage; Shamane Siriwardhana; Violetta Shevchenko; Karol Pajak; James Snewin; Gil Avraham; Alexander Long (CoRR, 2026)