TY - GEN A1 - Jünger, Michael A1 - Martin, Alexander A1 - Reinelt, Gerhard A1 - Weismantel, Robert T1 - Quadratic 0/1 Optimization and a Decomposition Approach for the Placement of Electronic Circuits. N2 - The placement in the layout design of electronic circiuts consists of finding a non- overlapping assignment of rectangular cells to positions on the chip so what wireability is guaranteed and certain technical constraints are met.This problem can be modelled as a quadratic 0/1- program subject to linear constraints. We will present a decomposition approach to the placement problem and give results about $NP$-hardness and the existence of $\varepsilon$-approximative algorithms for the involved optimization problems. A graphtheoretic formulation of these problems will enable us to develop approximative algorithms. Finally we will present details of the implementation of our approach and compare it to industrial state of the art placement routines. {\bf Keywords:} Quadratic 0/1 optimization, Computational Complexity, VLSI-Design. T3 - ZIB-Report - SC-92-10 KW - quadratic 0/1 optimization KW - computational complexity KW - VLSI-Design Y1 - 1992 U6 - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:0297-zib-803 ER -