George Pólya

Pólya György

Robert E. Tarjan

Woods

Donald R. Woods

Tarjan

In the winter of 1978, Professor George P61ya and I jointly taught Stanford University's introductory combinatorics course. This was a great opportunity for me, as I had known of Professor P61ya since having read his classic book, How to Solve It, as a teenager. Working with P6lya, who ·was over ninety years old at the time, was every bit as rewarding as I had hoped it would be. His creativity, intelligence, warmth and generosity of spirit, and wonderful gift for teaching continue to be an inspiration to me. Combinatorics is one of the branches of mathematics that play a crucial role in computer sCience, since digital computers manipulate discrete, finite objects. Combinatorics impinges on computing in two ways. First, the properties of graphs and other combinatorial objects lead directly to algorithms for solving graph-theoretic problems, which have widespread application in non-numerical as well as in numerical computing. Second, combinatorial methods provide many analytical tools that can be used for determining the worst-case and expected performance of computer algorithms. A knowledge of combinatorics will serve the computer scientist well. Combinatorics can be classified into three types: enumerative, eXistential, and constructive. Enumerative combinatorics deals with the counting of combinatorial objects. Existential combinatorics studies the existence or nonexistence of combinatorial configurations.

Notes on Introductory Combinatorics

Contains necessary required for selecting equipment for process engineering and design. KEY TOPICS: " This off-the-shelf, "look-up" book contains data needed by practicing engineers covering the properties of materials, liquids, gases and includes an index to chemicals with cross referencing for synonyms. For engineers.

Data for Process Design and Engineering Practice

"Here is a handy, concise reference to save engineers time and effort in solving problems in design, process improvement, operation and troubleshooting. Included are practical experience for reactors, and equipment for size reduction and enlargement, mixing and blending, and physical separations - topics that are rarely given in other sourcebooks. This is not a listing of facts; rather it is a synthesis of data from the author's experience, colleagues in industry and hundreds of sources, expressed with consistent terminology and SI units to make use easy." "Extensive cross-referencing guides the engineer in locating equipment used for many different purposes. A detailed index quickly and reliably directs engineers in their everyday work at process plants: from keywords to solutions in a matter of minutes. Key dimensionless groups, handy conversion factors, and vapour pressure data are included." "Practical how-to tips are given for handling corrosion, controlling processes, design, process improvement, problem solving, goal setting, team work, performance reviews, listening, communication, leadership and much more."--Page 4 of cover.

Rules of Thumb in Engineering Practice

An immense treasure trove containing hundreds of equipment symptoms, arranged so as to allow swift identification and elimination of the causes. These rules of thumb are the result of preserving and structuring the immense knowledge of experienced engineers collected and compiled by the author - an experienced engineer himself - into an invaluable book that helps younger engineers find their way from symptoms to causes. This sourcebook is unrivalled in its depth and breadth of coverage, listing five important aspects for each piece of equipment: * area of application * sizing guidelines * capital cost including difficult-to-find installation factors * principles of good practice, and * good approaches to troubleshooting. Extensive cross-referencing takes into account that some items of equipment are used for many different purposes, and covers not only the most familiar types, but special care has been taken to also include less common ones. Consistent terminology and SI units are used throughout the book, while a detailed index quickly and reliably directs readers, thus aiding engineers in their everyday work at chemical plants: from keywords to solutions in a matter of minutes.

Donald R. Woods

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