Processor-efficient parallel solution of linear systems. II. The positive characteristic and singular cases

E. Kaltofen, V. Pan
1992 Proceedings., 33rd Annual Symposium on Foundations of Computer Science  
We show that over any field, the solution set to a system of n linear equations in n unknowns can be computed in parallel with randomization simultaneously in poly-logarithmic time in n and with only as many processors as are utilized to multiply two n×n matrices. A time unit represents an arithmetic operation in the field. For singular systems our parallel timings are asymptotically as fast as those for non-singular systems, due to our avoidance of binary search in the matrix rank problem,
more » ... pt when the field has small positive characteristic; in that case, binary search is avoided at a somewhat higher processor count measure.
doi:10.1109/sfcs.1992.267779 dblp:conf/focs/KaltofenP92 fatcat:dkabtrjt6fgwvadqjijsaakm2i