arXiv The 3d mixed BF Lagrangian 1-form: a variational formulation of Hitchin’s integrable system Vincent Caudrelier, Derek Harland, Anup Anand Singh, and Benoît Vicedo Sep 2025 arXiv SIGMA Lagrangian multiform for cyclotomic Gaudin models Vincent Caudrelier, Anup Anand Singh, and Benoît Vicedo SIGMA, Nov 2024 arXiv Journal LMP Lagrangian multiforms on coadjoint orbits for finite-dimensional integrable systems Vincent Caudrelier, Marta Dell’Atti, and Anup Anand Singh Letters in Mathematical Physics, Feb 2024 arXiv Journal CQG Entropy and the link action in the causal set path-sum Abhishek Mathur, Anup Anand Singh, and Sumati Surya Classical and Quantum Gravity, Dec 2020 arXiv Journal