The computational complexity of a formal process for the construction of term classes for information retrieval is examined. While the process is proven to be difficult computationally, heuristic methods are applied. Experimental results are obtained to illustrate the maximum possible improvement in system performance of retrieval using the formal…

Nearly 150 papers presented at this conference, sponsored by the International Federation for Information Processing, are included in this volume which surveys the state of the art of computer education. Nine papers provide an overview on such topics as computer science and mathematics, computer education in the 1970's, computers and the…