Note on single machine common flow allowance group scheduling with learning effect and resource allocation

Recent papers (Sun et al., 2020; Lv et al., 2021), they studied single machine due date assignment scheduling problems with learning effect and resource allocation. In this note, we show that the published results of Sun et al. (2020) and Lv et al. (2021) are incorrect by two counter-examples. Then the corrected results are provided, and we also explain why they are incorrect.