Book Reviews 179

the Lebesque integral. The remaining three chapters present original results. Sets of removable singularities for functions in the spaces Wp 1, for both quasiconformal and quasi-isometric mappings are studied. The changes of variable that keep invariant the spaces are described completely. Necessary conditions for extension of a function given on a domain to the whole space while preserving the class to which the function belongs are obtained.

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M. Rakman (ed.), Ocean Waves Mechanics, Computational Fluid Dynamics, and Mathematical Modelling. Computational Mechanics Publications, Southampton/Springer, Berlin, 1990. 954 pp., UK£145, ISBN 1-85312-065-0.

This huge volume contains the edited proceedings of the Eleventh International Conference of the Canadian Applied Mathematics Society held in 1990 in Nova Scotia. World leaders in the subjects of the title assembled to demonstrate the applicability of mathematics to various real life problems. Contents: Section 1: Keynote Lecture Section 2a: Mechanics of Ocean Waves (6 papers) Section 2b: Section 3a: Section 3b: Section 4a: Section 4b: Tt,.ere is no

Contributed Papers (21 papers) Computational Fluid Dynamics (6 papers) Contributed Papers (28 papers) Mathematical Modelling (8 papers) Contributed Papers (24 papers). index.

(WFA)

R.M. Friedhoff and W. Benzon, Visualization ~ The Second Computer Revolutiom Freeman, New York, 1991. 215 pp., UK£17.95, ISBN 0-7167-2231-3.

In studying the mechanisms of visual perception, one soon acquires a rat_,er different view of the visual world we experience, recognizing that, made as it is from ephemeral energies reaching the retina, it is quite a marvelous achievement. One comes to view the eye/bra_:.n as a synthesizer improbably creating a stable world of things from the inchoate world of light. It is just these generative powers of visual perception that are marvelously exploited by the technologies of visualization, the subject of this book. A new field - - visualization - - has emerged.

Technologically speaking, the barriers separating the fields of diagnostic imaging, computer graphics, remote sensing, image processing, and many other disciplines that use images were dissolving because of the digital computer. Algorithms developed in one field could be borrowed for use in others. There was an extraordinary potential for the development of a defined body of interrelated visualization techniques as well as entirely new kinds of visualization machines by combining methods from different disciplines - - a potential that is being fulfilled and is illustrated here.

(WFA)