### Beno Eckmann

The statements of a number of theorems in algebraic topology, some classical and some recent, can be "linearized" to give relatively easy results. Direct proofs of the theorems from the linearized versions would likely have some general significance, but no such proofs are known.

(pp. 520)

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### Allyn Jackson

The Smithsonian Institution is the national museum of the United States. It has a stunning collection of 600 rare books in mathematics and a wide-ranging collection of some 5,000 other objects in mathematics and computer science.

(pp. 528)

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### H. Wu

The author puts inservice training of mathematics teachers in the context of teachers' overall mathematics education and gives critiques of three examples of mathematical presentations that are part of inservice training.

(pp. 535)

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