Partial regularity for degenerate parabolic systems with general growth via caloric approximations

We establish a partial regularity result for solutions of parabolic systems with general \(\varphi \) $\phi$ -growth, where \(\varphi \) $\phi$ is an Orlicz function. In this setting we can develop a unified approach that is independent of the degeneracy of system and relies on two caloric approximation results: the \(\varphi \) $\phi$ -caloric approximation, which was introduced in Diening et al. (Calc Var Partial Differ Equ 56(4):27, 2017), and an improved version of the \({\mathcal {A}}\) $\mathcal{A}$ -caloric approximation, which we prove without using the classical compactness method.