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2015, 3rd edition., Graduate studies in mathematics, ISBN 9780821898543, Volume 163, xxiv, 629
Book
2005, ISBN 0521821126, Volume 9780521821124, xix, 777
.... Both static and time-dependent density functional theory are presented in detail. Although the emphasis is on the development of the basic physical ideas and on a critical discussion of the most useful approximations, the formal derivation of the results is highly detailed and based on the simplest, most direct methods. 
Many-body problem | Fermi surfaces | Hartree-Fock approximation | Fermi liquid theory | Quantum field theory | History | Wrestlers | Wrestling | Electron mobility | Quantum Hall effect
Book
eJournal
Approximation theory and its applications, ISSN 1000-9221, 1985
Journal
2017, Series on concrete and applicable mathematics, ISBN 9813145838, Volume 20., xii, 334 pages
Book
2006, Condensed matter physics, nanoscience and mesoscopic physics, ISBN 0521815916, Volume 9780521815918, xxii, 348
.... It starts with a detailed description of the various theoretical approaches to calculating the electronic structure of solids and molecules, including density-functional theory and chemical methods... 
Density functionals | Condensed matter | Computer simulation | Hartree-Fock approximation
Book
The Journal of chemical physics, ISSN 1089-7690, 04/2012, Volume 136, Issue 15, pp. 150901 - 150901-9
Density functional theory (DFT) is an incredible success story. The low computational cost, combined with useful... 
Physical Sciences | Chemistry | Physics, Atomic, Molecular & Chemical | Chemistry, Physical | Physics | Science & Technology | Correlation | Electronic structure | Liquids | Approximation | Density functional theory | Materials science | Computational efficiency | Standards
Journal Article
2005, ISBN 9067644277, xviii, 919
Book
2011, Mathematical surveys and monographs, ISBN 0821853619, Volume 178, vii, 363
Book
2007, Cambridge monographs on applied and computational mathematics, ISBN 052186559X, xii, 224
The goal of learning theory is to approximate a function from sample values. To attain this goal learning theory draws on a variety of diverse subjects, specifically statistics, approximation theory, and algorithmics... 
Approximation theory | Computational learning theory
Book
IEEE transactions on signal processing, ISSN 1941-0476, 09/2011, Volume 59, Issue 9, pp. 4053 - 4085
Journal Article