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A Tangle of Trees: #2

Author: Johanna Gohmann

Publisher: ABDO

Published: 2022-08-01

Total Pages: 115

ISBN-13: 1098233980

A week has passed since Agnes crawled through a portal in a diner's freezer into another dimension and was briefly turned into a meerkat. Her friend Isaac doesn't believe her, so they venture back to the Crispy Biscuit. In Paragon, Agnes transforms into a vervet monkey and Isaac is an African gray parrot. But the duo's fun is interrupted by a stinky creature's cries. Can they avoid the boomslang, or will they get tangled up in helping the creature back to its burrow? Aligned to Common Core Standards and correlated to state standards. Calico is an imprint of Magic Wagon, a division of ABDO.

The Tangled Tree

Author: David Quammen

Publisher: Simon & Schuster

Published: 2019-08-06

Total Pages: 480

ISBN-13: 1476776636

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In this New York Times bestseller and longlist nominee for the National Book Award, “our greatest living chronicler of the natural world” (The New York Times), David Quammen explains how recent discoveries in molecular biology affect our understanding of evolution and life’s history. In the mid-1970s, scientists began using DNA sequences to reexamine the history of all life. Perhaps the most startling discovery to come out of this new field—the study of life’s diversity and relatedness at the molecular level—is horizontal gene transfer (HGT), or the movement of genes across species lines. It turns out that HGT has been widespread and important; we now know that roughly eight percent of the human genome arrived sideways by viral infection—a type of HGT. In The Tangled Tree, “the grandest tale in biology….David Quammen presents the science—and the scientists involved—with patience, candor, and flair” (Nature). We learn about the major players, such as Carl Woese, the most important little-known biologist of the twentieth century; Lynn Margulis, the notorious maverick whose wild ideas about “mosaic” creatures proved to be true; and Tsutomu Wantanabe, who discovered that the scourge of antibiotic-resistant bacteria is a direct result of horizontal gene transfer, bringing the deep study of genome histories to bear on a global crisis in public health. “David Quammen proves to be an immensely well-informed guide to a complex story” (The Wall Street Journal). In The Tangled Tree, he explains how molecular studies of evolution have brought startling recognitions about the tangled tree of life—including where we humans fit upon it. Thanks to new technologies, we now have the ability to alter even our genetic composition—through sideways insertions, as nature has long been doing. “The Tangled Tree is a source of wonder….Quammen has written a deep and daring intellectual adventure” (The Boston Globe).

Tangles

Author: Reinhard Diestel

Publisher: Cambridge University Press

Published: 2024-05-31

Total Pages: 299

ISBN-13: 100947331X

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Discover how the theory of tangles identifies types of qualities in data sets, offering a structural approach to artificial intelligence.

The Tangled Tree

Author: David Quammen

Publisher: Simon and Schuster

Published: 2018-08-14

Total Pages: 480

ISBN-13: 1476776644

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Matching minors in bipartite graphs

Author: Wiederrecht, Sebastian

Publisher: Universitätsverlag der TU Berlin

Published: 2022-04-19

Total Pages: 486

ISBN-13: 3798332525

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In this thesis we adapt fundamental parts of the Graph Minors series of Robertson and Seymour for the study of matching minors and investigate a connection to the study of directed graphs. We develope matching theoretic to established results of graph minor theory: We characterise the existence of a cross over a conformal cycle by means of a topological property. Furthermore, we develope a theory for perfect matching width, a width parameter for graphs with perfect matchings introduced by Norin. here we show that the disjoint alternating paths problem can be solved in polynomial time on graphs of bounded width. Moreover, we show that every bipartite graph with high perfect matching width must contain a large grid as a matching minor. Finally, we prove an analogue of the we known Flat Wall theorem and provide a qualitative description of all bipartite graphs which exclude a fixed matching minor. In der vorliegenden Arbeit werden fundamentale Teile des Graphminorenprojekts von Robertson und Seymour für das Studium von Matching Minoren adaptiert und Verbindungen zur Strukturtheorie gerichteter Graphen aufgezeigt. Wir entwickeln matchingtheoretische Analogien zu etablierten Resultaten des Graphminorenprojekts: Wir charakterisieren die Existenz eines Kreuzes über einem konformen Kreis mittels topologischer Eigenschaften. Weiter entwickeln wir eine Theorie zu perfekter Matchingweite, einem Weiteparameter für Graphen mit perfekten Matchings, der von Norin eingeführt wurde. Hier zeigen wir, dass das Disjunkte Alternierende Pfade Problem auf bipartiten Graphen mit beschränkter Weite in Polynomialzeit lösbar ist. Weiter zeigen wir, dass jeder bipartite Graph mit hoher perfekter Matchingweite ein großes Gitter als Matchingminor enthalten muss. Schließlich zeigen wir ein Analogon des bekannten Flat Wall Theorem und geben eine qualitative Beschreibung aller bipartiter Graphen an, die einen festen Matching Minor ausschließen.

Infinite Analysis: Rims Project 1991 (In 2 Volumes)

Author: Tohru Eguchi

Publisher: World Scientific

Published: 1992-06-25

Total Pages: 1104

ISBN-13: 9814554901

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This is a collection of original research papers presented at the workshop. The main topics covered are Conformal Field Theory, Integrable Massive Field Theory, Quantum Gravity, Quantum Group, Lattice Solvable Models, Low Dimensional Topology, and C* Algebras.

Graph Theory

Author: Reinhard Diestel

Publisher: Springer (print edition); Reinhard Diestel (eBooks)

Published: 2024-07-09

Total Pages: 472

ISBN-13:

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Professional electronic edition, and student eBook edition (freely installable PDF with navigational links), available from diestel-graph-theory.com This standard textbook of modern graph theory, now in its sixth edition, combines the authority of a classic with the engaging freshness of style that is the hallmark of active mathematics. It covers the core material of the subject with concise yet reliably complete proofs, while offering glimpses of more advanced methods in each field by one or two deeper results, again with proofs given in full detail. The book can be used as a reliable text for an introductory course, as a graduate text, and for self-study. New in this 6th edition: Two new sections on how to apply the regularity lemma: counting lemma, removal lemma, and Szemerédi's theorem. New chapter section on chi-boundedness. Gallai's A-paths theorem. New or substantially simplified proofs of: - Lovász's perfect graph theorem - Seymour's 6-flow theorem - Turán's theorem - Tutte's theorem about flow polynomials - the Chvátal-Erdös theorem on Hamilton cycles - the tree-of-tangles theorem for graph minors (two new proofs, one canonical) - the 5-colour theorem Several new proofs of classical theorems. Many new exercises. From the reviews: “This outstanding book cannot be substituted with any other book on the present textbook market. It has every chance of becoming the standard textbook for graph theory.” Acta Scientiarum Mathematicarum "Deep, clear, wonderful. This is a serious book about the heart of graph theory. It has depth and integrity." Persi Diaconis & Ron Graham, SIAM Review “The book has received a very enthusiastic reception, which it amply deserves. A masterly elucidation of modern graph theory.” Bulletin of the Institute of Combinatorics and its Applications “Succeeds dramatically… a hell of a good book.” MAA Reviews “A highlight of the book is what is by far the best account in print of the Seymour-Robertson theory of graph minors.” Mathematika “…like listening to someone explain mathematics.” Bulletin of the AMS

Tangle Tree

Author: A. E. Smith

Publisher: Wipf and Stock Publishers

Published: 2022-03-18

Total Pages: 444

ISBN-13: 1666730246

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If you are easily frightened, stay away from Tangle Tree, where diabolical entities watch for opportunities to persecute the living. Even today, Tangle Tree Valley is cursed by the legend of a deadly confrontation in 1192 between a powerful Shawnee sorceress and a ruthless tribal leader. The disturbing presence of five oak trees stand in memorial of his murders and her revenge. Likewise, Tangle Tree Manor is believed to be haunted by the ghosts of the Crayton family, who built the mansion after fleeing the potato famine of Scotland in the 1850s. The family was tormented with suspicion, tragedy, and the constant fear of retribution for Richard Crayton’s betrayal of vindictive conspirators. Being unaware of the danger, six people seeking psychiatric treatment, two psychiatrists, and Jesse Kingston, the property manager, commit to a six-week stay in the isolated mansion, despite its haunted reputation. Supernatural apparitions menace the occupants and secret agendas complicate the treatment process. Dangerous intruders, mysterious disappearances, and unexplainable events abound as relationships, both amiable and antagonistic, develop during their stay. The nine face physical and emotional challenges as they struggle to untangle the truth of their own tragedies and survive the curse of Tangle Tree Valley.

The Christmas Tree Tangle

Author: Margaret Mahy

Publisher: Andrews UK Limited

Published: 2011-12-13

Total Pages: 18

ISBN-13: 1849899037

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The kitten has climbed the Christmas tree! Climbed so high and climbed so far to cling with her claws to the Christmas star. So begins the magically illustrated story of the - Christmas Tree Tangle - in which the kitten, the cat, the dog, the goat and even the pigs get stuck in the branches of the town Christmas tree. This is a delightful tale to read along with Children at the festive season.

Topics in Structural Graph Theory

Author: Lowell W. Beineke

Publisher: Cambridge University Press

Published: 2012-11-08

Total Pages: 346

ISBN-13: 1107244307

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The rapidly expanding area of structural graph theory uses ideas of connectivity to explore various aspects of graph theory and vice versa. It has links with other areas of mathematics, such as design theory and is increasingly used in such areas as computer networks where connectivity algorithms are an important feature. Although other books cover parts of this material, none has a similarly wide scope. Ortrud R. Oellermann (Winnipeg), internationally recognised for her substantial contributions to structural graph theory, acted as academic consultant for this volume, helping shape its coverage of key topics. The result is a collection of thirteen expository chapters, each written by acknowledged experts. These contributions have been carefully edited to enhance readability and to standardise the chapter structure, terminology and notation throughout. An introductory chapter details the background material in graph theory and network flows and each chapter concludes with an extensive list of references.