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Provides complete information for designing, installing, and maintaining steel pipe and fittings for potable water transmission and distribution. M11 has been completely updated. Additional information on, fittings design, welded joint design, suggested bracing for shipping of pipe, weld details for outlets and crotch plates, aboveground design and more has been added.

John McKay's remarkable insights unveiled a connection between the 'double covers' of the groups of regular polyhedra, known since ancient Greek times, and the exceptional Lie algebras, recognized since the late nineteenth century. The correspondence involves certain diagrams, the ADE diagrams, which can be interpreted in different ways: as quivers associated with the groups, and Dynkin diagrams of root systems of Lie algebras. The ADE diagrams arise in many areas of mathematics, including topics in relativity and string theory, spectral theory of graphs and cluster algebras. Accessible to...