TY - Jour Au - McCartin，Brian J. Py - 2003DA - 1900/01/01 TI - PseudoInse of Mygerric-Schrödinger扰动理论对称矩阵特征值问题SP - 424519 VL - 2003 AB - SN - 1110-757X- https://doi.org/10.1155/s1110757x03303092 do - 10.1155 / s1110757x03303092 jf - 应用数学Pb - Hindwi Publishing Corporation KW - ER -