TY - JOUR A1 - Pawelke, Siegfried A1 - Butzer, Paul L. T1 - Semi-groups and resolvent operators T2 - Archive for Rational Mechanics and Analysis KW - Resolvent Operator KW - Electromagnetism KW - Complex System KW - Neural Network KW - Nonlinear Dynamics Y1 - 1968 UR - https://opus.bibliothek.fh-aachen.de/opus4/frontdoor/index/index/docId/3309 SN - 0003-9527 VL - 30 IS - 2 SP - 127 EP - 147 PB - Springer CY - Berlin ER -