Claus Müller – författare

The Power of New Urban Tourism explores new forms of tourism in urban areas with their social, political, cultural, architectural and economic implications. By investigating various showcases of New Urban Tourism within its social and spatial frames, the book offers insights into power relations and connections between tourism and cityscapes in various socio-spatial settings around the world.Contributors to the volume show how urban space has become a battleground between local residents and visitors, with changing perceptions of tourists as co-users of public and private urban spaces and as influencers of the local economies. This includes different roles of digital platforms as resources for access to the city and touristic opportunities as well as ways to organise and express protest or shifting representations of urban space. With contemporary cases from a wide disciplinary spectrum, the contributors investigate the power of New Urban Tourism in Africa, Asia, the Americas, Europe and Oceania. This focus allows a cross-cultural evaluation of New Urban Tourism and its dynamic, and changing conception transforming and subverting cities and tourism alike.The Power of New Urban Tourism will be of great interest to academics, researchers and students in the fields of cultural studies, sociology, the political sciences, economics, history, human geography, urban design and planning, architecture, ethnology and anthropology.

The Power of New Urban Tourism explores new forms of tourism in urban areas with their social, political, cultural, architectural and economic implications. By investigating various showcases of New Urban Tourism within its social and spatial frames, the book offers insights into power relations and connections between tourism and cityscapes in various socio-spatial settings around the world.Contributors to the volume show how urban space has become a battleground between local residents and visitors, with changing perceptions of tourists as co-users of public and private urban spaces and as influencers of the local economies. This includes different roles of digital platforms as resources for access to the city and touristic opportunities as well as ways to organise and express protest or shifting representations of urban space. With contemporary cases from a wide disciplinary spectrum, the contributors investigate the power of New Urban Tourism in Africa, Asia, the Americas, Europe and Oceania. This focus allows a cross-cultural evaluation of New Urban Tourism and its dynamic, and changing conception transforming and subverting cities and tourism alike.The Power of New Urban Tourism will be of great interest to academics, researchers and students in the fields of cultural studies, sociology, the political sciences, economics, history, human geography, urban design and planning, architecture, ethnology and anthropology.

This book gives a new and direct approach into the theories of special functions with emphasis on spherical symmetry in Euclidean spaces of ar­ bitrary dimensions. Essential parts may even be called elementary because of the chosen techniques. The central topic is the presentation of spherical harmonics in a theory of invariants of the orthogonal group. H. Weyl was one of the first to point out that spherical harmonics must be more than a fortunate guess to simplify numerical computations in mathematical physics. His opinion arose from his occupation with quan­ tum mechanics and was supported by many physicists. These ideas are the leading theme throughout this treatise. When R. Richberg and I started this project we were surprised, how easy and elegant the general theory could be. One of the highlights of this book is the extension of the classical results of spherical harmonics into the complex. This is particularly important for the complexification of the Funk-Hecke formula, which is successfully used to introduce orthogonally invariant solutions of the reduced wave equation. The radial parts of these solutions are either Bessel or Hankel functions, which play an important role in the mathematical theory of acoustical and optical waves. These theories often require a detailed analysis of the asymptotic behavior of the solutions. The presented introduction of Bessel and Hankel functions yields directly the leading terms of the asymptotics. Approximations of higher order can be deduced.

This book gives a new and direct approach into the theories of special functions with emphasis on spherical symmetry in Euclidean spaces of ar­ bitrary dimensions. Essential parts may even be called elementary because of the chosen techniques. The central topic is the presentation of spherical harmonics in a theory of invariants of the orthogonal group. H. Weyl was one of the first to point out that spherical harmonics must be more than a fortunate guess to simplify numerical computations in mathematical physics. His opinion arose from his occupation with quan­ tum mechanics and was supported by many physicists. These ideas are the leading theme throughout this treatise. When R. Richberg and I started this project we were surprised, how easy and elegant the general theory could be. One of the highlights of this book is the extension of the classical results of spherical harmonics into the complex. This is particularly important for the complexification of the Funk-Hecke formula, which is successfully used to introduce orthogonally invariant solutions of the reduced wave equation. The radial parts of these solutions are either Bessel or Hankel functions, which play an important role in the mathematical theory of acoustical and optical waves. These theories often require a detailed analysis of the asymptotic behavior of the solutions. The presented introduction of Bessel and Hankel functions yields directly the leading terms of the asymptotics. Approximations of higher order can be deduced.