2026. Stability and Error Estimates of Ultra-Weak Local Discontinuous Galerkin Method with Spectral Deferred Correction Time-Marching for PDEs with High Order Spatial Derivatives. Journal of Computational Mathematics. 44, 1 (Feb. 2026), 286–306. DOI:https://doi.org/10.4208/jcm.2410-m2024-0092.