Parallel Class

A set of blocks, also called a Resolution Class, that partition the set $V$, where $(V,B)$ is a balanced incomplete Block Design.

See also Block Design, Resolvable

References

Abel, R. J. R. and Furino, S. C. ``Resolvable and Near Resolvable Designs.'' §I.6 in The CRC Handbook of Combinatorial Designs (Ed. C. J. Colbourn and J. H. Dinitz). Boca Raton, FL: CRC Press, pp. 87-94, 1996.