Coarray usage resources

[FortranFan]

@nncarlson

… I’d also be interested in any similar resources that approach coarrays from the perspective of an MPI user.

Perhaps not as much as from a comparison or size-by-side formulation of SPMD programs using the coarray Fortran approach relative to the MPI model but as a semiformal reference into the thoughts of an inventor of the coarray model, a resource worth reviewing closely is Parallel Programming with Co-arrays by Robert Numrich (Taylor & Francis, 2018).