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This self-contained monograph addresses the flow equation approach to many-particle systems. The flow equation approach consists of a sequence of infinitesimal unitary transformations and is conceptually similar to renormalization and scaling methods. Flow equations provide a framework for analyzing Hamiltonian systems where these conventional many-body techniques fail. The text first discusses the general ideas and concepts of the flow equation method. In a second part these concepts are illustrated with various applications in condensed matter theory including strong-coupling problems and non-equilibrium systems. The monograph is accessible to readers familiar with graduate- level solid-state theory.

Many-body problem. --- Unitary transformations. --- Hamiltonian systems. --- Particles (Nuclear physics) --- Quantum field theory. --- Condensed matter. --- Problème des N corps --- Systèmes hamiltoniens --- Particules (Physique nucléaire) --- Théorie quantique des champs --- Matière condensée --- Particles (Nuclear physics). --- Physics --- Physical Sciences & Mathematics --- Atomic Physics --- Condensed materials --- Condensed media --- Condensed phase --- Materials, Condensed --- Media, Condensed --- Phase, Condensed --- Relativistic quantum field theory --- Elementary particles (Physics) --- High energy physics --- Nuclear particles --- Nucleons --- Hamiltonian dynamical systems --- Systems, Hamiltonian --- Transformations, Unitary --- n-body problem --- Problem of many bodies --- Problem of n-bodies --- Physics. --- Condensed Matter Physics. --- Theoretical, Mathematical and Computational Physics. --- Liquids --- Matter --- Solids --- Natural philosophy --- Philosophy, Natural --- Physical sciences --- Dynamics --- Field theory (Physics) --- Quantum theory --- Relativity (Physics) --- Nuclear physics --- Differentiable dynamical systems --- Mechanics, Analytic --- Transformations (Mathematics) --- Mathematical physics. --- Physical mathematics --- Mathematics

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Dialectology --- German language --- Nassau

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Germanic languages --- Phonology. --- Morphology.

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This book addresses the changing contemporary language worlds in three major contexts. It first discusses how the language landscape maps of cities are changing as a result of increased migration, globalization and global media. These features are evident in place names and place name changes as well as the densities and frequencies of language spoken and used in texts. The second section discusses how the state itself is responding to both indigenous and heritage groups desiring to be included and represented in the state’s political landscapes and also expressions of art and culture. In the third section, the authors address a number of cutting-edge theses that are emerging in the linguistic geography and political words. These include the importance of gender, anthropogenetic discourse, the preservation of endangered languages and challenges to a state’s official language policy. Through including authors from nine different countries, who are writing about issues in twelve countries and their overlapping interests in language mapping, language usage and policy and visual representations, this book provides inspiring research into future topics at local, national, regional and international scales. .

Human geography. --- Linguistics. --- Geography. --- Language and languages—Study and teaching. --- Human Geography. --- Language Education. --- Cosmography --- Earth sciences --- World history --- Linguistic science --- Science of language --- Language and languages --- Anthropo-geography --- Anthropogeography --- Geographical distribution of humans --- Social geography --- Anthropology --- Geography --- Human ecology --- Globalization --- Language policy. --- Language planning. --- Sociolinguistics. --- Social aspects. --- Language and culture --- Linguistics --- Sociology --- Integrational linguistics (Oxford school) --- Planned language change --- Sociolinguistics --- Communication policy --- Language planning --- Planning

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This reference work delivers an interdisciplinary, applied spatial and geographical approach to the study of languages and linguistics. This work includes chapters and sections related to language origins, diffusion, conflicts, policies, education/instruction, representation, technology, regions, and mapping. Also addressed is the mapping of languages and linguistic diversity, on language in the context of politics, on the relevance of language to cultural identity, on language minorities and endangered languages, and also on language and the arts and non-human language and communication. This reference work looks at the subject matter and contributors to the disciplines and programs in the social sciences and humanities, and the dearth of materials on languages and linguistics. The topics covered are not only discipline-centered, but in the cutting-edge fields that intersect several disciplines and also cut across the social sciences and humanities. These include gender studies, sustainability and development, technology and social media impacts, law and human rights, climate change, public health and epidemiology, architecture, religion, visual representation and mapping. These new and emerging research directions and other intersecting fields are not traditionally discipline-bounded, but cut across numerous fields. The volumes will appeal to those within existing fields and disciplines and those working the intersections at local, regional and global scales.

Environmental planning --- Linguistics --- Social geography --- Geography --- ruimtelijke ordening --- linguïstiek --- geografie