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SpringerWienNewYork
Dr. Inna Shingareva
Department of Mathematics, University of Sonora, Sonora, Mexico
Dr. Carlos Lizárraga-Celaya
Department of Physics, University of Sonora, Sonora, Mexico
This work is subject to copyright.
All rights are reserved, whether the whole or part of the material is concerned,
specifically those of translation, reprinting, re-use of illustrations, broadcasting,
reproduction by photocopying machines or similar means, and storage in data banks.
Product Liability: The publisher can give no guarantee for all the information contained
in this book. This does also refer to information about drug dosage and application
thereof. In every individual case the respective user must check its accuracy by consul-
ting other pharmaceutical literature. The use of registered names, trademarks, etc. in
this publication does not imply, even in the absence of a specific statement, that such
names are exempt from the relevant protective laws and regulations and therefore free
for general use.
© 2007 Springer-Verlag/Wien
Printed in Austria
SpringerWienNewYork is part of
Springer Science + Business Media
Typesetting: Camera ready by the authors
Printing: Holzhausen Druck und Medien GmbH, 1140 Vienna, Austria
Printed on acid-free and chlorine-free bleached paper
SPIN: 12078479
Library of Congress Control Number: 2007932621
ISBN 978-3-211-73264-9 SpringerWienNewYork
To our parents,
with inifinite admiration, love, and gratitute.
Preface
It is well known puter algebra systems have revolutionized
teaching and the learning processes in mathematics, science, and en-
gineering, allowing students putationally plicated
problems to find exact or approximate analytic solutions, numeric solu-
tions, and illustrative two- and three-dimensional graphics.
Since the 1960s there has existed individual packages