Fig. 1From: Efficient solvers for time-dependent problems: a review of IMEX, LATIN, PARAEXP and PARAREAL algorithms for heat-type problems with potential use of approximate exponential integrators and reduced-order modelsSchematics of the PARAEXP algorithm [10]. Solid red lines represent the solutions of inhomogeneous problems with zero initial value on each time slice \([T_{j-1},T_j]\), computed in parallel. Blue dashed lines represent the solutions of homogeneous problems on time intervals \([T_j,T]\), also computed in parallelBack to article page