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#### The Kepler Conjecture

Springer New York 2011; US$ 74.95The Kepler conjecture, one of geometry's oldest unsolved problems, was formulated in 1611 by Johannes Kepler and mentioned by Hilbert in his famous 1900 problem list. The Kepler conjecture states that the densest packing of three-dimensional Euclidean space by equal spheres is attained by the ?cannonball" packing. In a landmark result, this was proved... more...

#### Hadamard Transforms

Society of Photo-Optical Instrumentation Engineers (SPIE) 2011; US$ 89.00The Hadamard matrix and Hadamard transform are fundamental problem-solving tools in a wide spectrum of scientific disciplines and technologies, such as communication systems, signal and image processing (signal representation, coding, filtering, recognition, and watermarking), digital logic (Boolean function analysis and synthesis), and fault-tolerant... more...

#### Cycles in Graphs

Elsevier Science 1985; US$ 72.95This volume deals with a variety of problems involving cycles in graphs and circuits in digraphs. Leading researchers in this area present here 3 survey papers and 42 papers containing new results. There is also a collection of unsolved problems. more...

#### Systems Dependability Assessment

Wiley 2015; US$ 75.00Presents recent developments of probabilistic assessment of systems dependability based on stochastic models, including graph theory, finite state automaton and language theory, for both dynamic and hybrid contexts. more...

#### Digraphs

Springer 2008; US$ 119.00Presents a number of algorithms, and includes chapters devoted to topics such as branchings, feedback arc and vertex sets, connectivity augmentations, sparse subdigraphs with prescribed connectivity. This book focuses on applications which include quantum mechanics, bioinformatics, embedded computing, and the travelling salesman problem. more...

#### Combinatorial Matrix Theory and Generalized Inverses of Matrices

Springer 2013; US$ 109.00This book consists of eighteen articles in the area of `Combinatorial Matrix Theory' and `Generalized Inverses of Matrices'. Original research and expository articles presented in this publication are written by leading Mathematicians and Statisticians working in these areas. The articles contained herein are on the following general topics:... more...

#### Favoritos (Our Favorites)

Shell Education 2010; US$ 8.99As the school year comes to an end, the students in this book recall their favorite things and activities from the year. They use graphs and charts to record and show their favorites. Join them as they relive their experiences through the year. 32pp. more...

#### Limpiar nuestra escuela (Cleaning Our School)

Shell Education 2010; US$ 8.99A big, summer storm left the school in this book a mess! The students, parents, and other volunteers worked to clean it up. They make teams to pick up aluminum cans, plastic bottles, and glass. After everything is cleaned up, they use graphs to show how much of each item they collected. They take these items to be recycled. They use the money they... more...