The purpose of this paper is to discuss the linear solution of equality constrained
problems by using the Frontal solution method without explicit assembling.
Design/methodology/approach–Re-written frontal solution method with a priori pivot and
front sequence. OpenMP parallelization, nearly linear (in elimination and substitution) up to
40 threads. Constraints enforced at the local assembling stage. Findings–When compared
with both standard sparse solvers and classical frontal implementations, memory ...