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mail is a two-dimensional-grid-abstraction class.
A grid naming abstraction is attached to the process list;
each process is specified by a pair (e.g., in the PO Box).
Through inheritance, row and column mailers are defined in each process
as the appropriate subsets of the two-dimensional grid. This class has
received the most extensive use because of the natural application to
linear algebra and related computations.
Class-specific primitives for G2-Class mail have been defined for both
higher efficiency and better abstraction. Small-g calls require mailer
specification while big-G calls do not, analogous to the y- and Y-type
calls defined generically above.
Wed Mar 1 10:19:35 EST 1995