“…As discussed for the problem of center cross crack in a superconducting cylinder, 19 in the ZFC activation process, when the applied field is reduced from B m to B a , there are three similar situations denoted, respectively, by Case (i), Case (ii), and Case (iii), which are dependent on B a as well. Also, if set B Ã 1 and B Ã 2 , respectively, denote the external applied fields when the situations change from (i) to (ii) and from (ii) to (iii), B Ã 1 and B Ã 2 can be expressed, respectively, as…”