### F. Hirzebruch

Hirzebruch gives an appreciation of how much his own work in algebraic geometry and several complex variables has depended on the mathematics of the late Fields Medalist Kunihiko Kodaira.

(pp. 1456)

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### Neil J. Cornish and Jeffrey R. Weeks

The authors describe how they and their colleagues, using some simple geometry and data obtained from a NASA satellite set for launch in the year 2000, hope to detect the curvature and topology of the universe.

(pp. 1463)

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