A safe sample screening rule for Laplacian twin parametric-margin support vector machine.

•A safe sample screening rule (SSSR-LTPSVM) for the LTPSVM is presented based on variational inequality.•SSSR-LTPSVM can detect support vectors before solving optimization problems and delete the redundant samples for solving the quadratic programming problems.•SSSR-LTPSVM not only works efficiently but also guarantees the solutions to be exactly the same with the LTPSVM.