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SIGACT News, Volume 21, 1990
Volume 21, Number 1, January 1990
- Gilles Brassard:

Cryptology - column 3 hot news on interactive protocols. 7 - Samir Khuller:

Open problems. 12 - D. T. Lee:

NSF report - computer and computation research. 13 - Michael C. Loui:

Reprint from computing reviews. 14 - Joseph O'Rourke:

Computational geometry column 9. 18 - Ian Parberry:

The journal review column. 21 - S. S. Ravi:

Journal backlog report. 26
Volume 21, Number 2, Spring 1990
- David S. Johnson:

A stoc/focs bibliography: the last progress report. 4 - Gilles Brassard:

Cryptology - column 4: hiding information from oracles. 5 - Cynthia Dwork:

Distributed computing column. 12 - D. T. Lee:

NSF report - computer and computation research. 16 - Ian Parberry:

The journal review column. 21 - Joan Feigenbaum:

Report on DIMACS seminar series. 25 - Susanne E. Hambrusch:

Report of the 21st midwest theory consortium. 30 - Arthur L. Liestman:

Report on WOBCATS meeting. 32 - Andrzej Proskurowski:

Report on GRA-GRA: 4th international workshop on graph grammars and their applications to computer science. 39 - Rex A. Dwyer:

Kinder, gentler average-case analysis for convex hulls and maximal vectors. 64
Volume 21, Number 3, Summer 1990
- Serge Abiteboul, Paris C. Kanellakis:

Database Theory Column: Query Languages for Complex Object Databases. 9-18
Volume 21, Number 4, Fall 1990
- Luigi Palopoli:

A new proof of undecidability of safety of logic queries. 69-72 - B. Ravikumar:

Some applications of a technique of Sakoda and Sipser. 73-77 - Martin Tompa:

Figures of merit: the sequel. 78-81

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