Geometry in Action - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Geometry in Action write by Clark Kimberling. This book was released on 2003. Geometry in Action available in PDF, EPUB and Kindle. Geometry in Action uses Sketchpad? to awaken student creativity through discovery-based learning. It supplements any college geometry course in which The Geometer's Sketchpad is used. All students must have access to The Geometer's Sketchpad.Each book is packaged with a CD-ROM for students that illustrates what is meant by geometry in action. Students explore 27 sketches prepared by the author to demonstrate Sketchpad's capabilities by dragging points to see shifts in graphs, by animating tesselations to create new patterns, and much, much more! Also included on this CD is the Poincare Disk, a Sketchpad file used to dig deeper into non-Euclidean geometry with The Geometer's Sketchpad.
From Groups to Geometry and Back
From Groups to Geometry and Back - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook From Groups to Geometry and Back write by Vaughn Climenhaga. This book was released on 2017-04-07. From Groups to Geometry and Back available in PDF, EPUB and Kindle. Groups arise naturally as symmetries of geometric objects, and so groups can be used to understand geometry and topology. Conversely, one can study abstract groups by using geometric techniques and ultimately by treating groups themselves as geometric objects. This book explores these connections between group theory and geometry, introducing some of the main ideas of transformation groups, algebraic topology, and geometric group theory. The first half of the book introduces basic notions of group theory and studies symmetry groups in various geometries, including Euclidean, projective, and hyperbolic. The classification of Euclidean isometries leads to results on regular polyhedra and polytopes; the study of symmetry groups using matrices leads to Lie groups and Lie algebras. The second half of the book explores ideas from algebraic topology and geometric group theory. The fundamental group appears as yet another group associated to a geometric object and turns out to be a symmetry group using covering spaces and deck transformations. In the other direction, Cayley graphs, planar models, and fundamental domains appear as geometric objects associated to groups. The final chapter discusses groups themselves as geometric objects, including a gentle introduction to Gromov's theorem on polynomial growth and Grigorchuk's example of intermediate growth. The book is accessible to undergraduate students (and anyone else) with a background in calculus, linear algebra, and basic real analysis, including topological notions of convergence and connectedness. This book is a result of the MASS course in algebra at Penn State University in the fall semester of 2009.
Geometry, Rigidity, and Group Actions
Geometry, Rigidity, and Group Actions - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Geometry, Rigidity, and Group Actions write by Robert J. Zimmer. This book was released on 2011-04-15. Geometry, Rigidity, and Group Actions available in PDF, EPUB and Kindle. The study of group actions is more than 100 years old but remains a widely studied topic in a variety of mathematic fields. A central development in the last 50 years is the phenomenon of rigidity, whereby one can classify actions of certain groups. This book looks at rigidity.
Geometry, Mechanics, and Control in Action for the Falling Cat
Geometry, Mechanics, and Control in Action for the Falling Cat - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook Geometry, Mechanics, and Control in Action for the Falling Cat write by Toshihiro Iwai. This book was released on 2021-04-23. Geometry, Mechanics, and Control in Action for the Falling Cat available in PDF, EPUB and Kindle. The falling cat is an interesting theme to pursue, in which geometry, mechanics, and control are in action together. As is well known, cats can almost always land on their feet when tossed into the air in an upside-down attitude. If cats are not given a non-vanishing angular momentum at an initial instant, they cannot rotate during their motion, and the motion they can make in the air is vibration only. However, cats accomplish a half turn without rotation when landing on their feet. In order to solve this apparent mystery, one needs to thoroughly understand rotations and vibrations. The connection theory in differential geometry can provide rigorous definitions of rotation and vibration for many-body systems. Deformable bodies of cats are not easy to treat mechanically. A feasible way to approach the question of the falling cat is to start with many-body systems and then proceed to rigid bodies and, further, to jointed rigid bodies, which can approximate the body of a cat. In this book, the connection theory is applied first to a many-body system to show that vibrational motions of the many-body system can result in rotations without performing rotational motions and then to the cat model consisting of jointed rigid bodies. On the basis of this geometric setting, mechanics of many-body systems and of jointed rigid bodies must be set up. In order to take into account the fact that cats can deform their bodies, three torque inputs which may give a twist to the cat model are applied as control inputs under the condition of the vanishing angular momentum. Then, a control is designed according to the port-controlled Hamiltonian method for the model cat to perform a half turn and to halt the motion upon landing. The book also gives a brief review of control systems through simple examples to explain the role of control inputs.
The Principle of Least Action in Geometry and Dynamics
The Principle of Least Action in Geometry and Dynamics - read free eBook in online reader or directly download on the web page. Select files or add your book in reader. Download and read online ebook The Principle of Least Action in Geometry and Dynamics write by Karl Friedrich Siburg. This book was released on 2004-05-17. The Principle of Least Action in Geometry and Dynamics available in PDF, EPUB and Kindle. New variational methods by Aubry, Mather, and Mane, discovered in the last twenty years, gave deep insight into the dynamics of convex Lagrangian systems. This book shows how this Principle of Least Action appears in a variety of settings (billiards, length spectrum, Hofer geometry, modern symplectic geometry). Thus, topics from modern dynamical systems and modern symplectic geometry are linked in a new and sometimes surprising way. The central object is Mather’s minimal action functional. The level is for graduate students onwards, but also for researchers in any of the subjects touched in the book.
