In this paper, we study generalized quantum operations and almost sharp quantum effects, our results generalize and improve some important conclusions in [2] and [3].
@article{arxiv.0907.2003,
title = {Generalized quantum operations and almost sharp quantum effects},
author = {Shen Jun and Wu Junde},
journal= {arXiv preprint arXiv:0907.2003},
year = {2017}
}