Some Relations for Quark Confinement and Chiral Symmetry Breaking in QCD Hideo Suganuma, Takahiro M. Doi, Krzysztof Redlich and Chihiro Sasaki EPJ Web Conf., 137 (2017) 04003 Published online: 22 March 2017 DOI: 10.1051/epjconf/201713704003