###

The September issue features an article about the important Arf-Kervaire invariant from algebraic topology. We also have a report about a digital math library in Czechoslovakia that may prove to be a model for other libraries. Another article considers a "fingerprinting" technology for mathematics papers. Finally, there is a discussion of the calculus concept inventory. --Steven G. Krantz, Editor
(pp. )

Email this

### Jerome Epstein

(pp. 1018)

Email this

### Miroslav Bartosek and Jirí Rákosník

(pp. 1029)

Email this

### Sara C. Billey and Bridget E. Tenner

(pp. 1034)

Email this

### Victor P. Snaith

(pp. 1040)

Email this