### Steve Batterson

By the start of the second decade of the twentieth century, the mathematics department at Harvard University was arguably the strongest in the United States. Yet this rise to mathematical prominence of America's oldest university was remarkably recent and rapid. The author tells the history of this transformation and the people who brought it about.

(pp. 800)

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### William H. Klink and Tuong Ton-That

The representations of the *n* x *n* unitary group have important applications in quantum physics. In particular, it is important to be able to compute the decompositions into irreducible factors of tensor powers of irreducible representations. The authors review the physics, the groups, and their representations, and discuss how the decompositions can be calculated.

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