Overview
Works: 599 works in 672 publications in 2 languages and 698 library holdings Academic theses  Schedules Publisher, pub, Other, Editor
Publication Timeline
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Most widely held works by Linköpings universitet
On the use of entropy in multiobjective programming by Asa Hallefjord( Book )

1 edition published in 1984 in English and held by 7 WorldCat member libraries worldwide

Application of fast backprojection techniques for some inverse problems of integral geometry by Stefan Nilsson( Book )

3 editions published between 1996 and 1997 in English and held by 6 WorldCat member libraries worldwide

Quantum paradoxes, probability theory, and change of ensemble by Jan-Åke Larsson( Book )

3 editions published in 2000 in English and held by 6 WorldCat member libraries worldwide

In this thesis, the question "What kind of models can be used to describe microcosmos?" will be discussed. Being difficult and very large in scope, the question has here been restricted to whether or not Local Realistic models can be used to describe Quantum-Mechanical processes, one of a collection of questions often referred to as Quantum Paradoxes. Two such paradoxes will be investigated using techniques from probability theory: the Bell inequality and the Greenberger-Horne-Zeilinger (GHZ) paradox. A problem with the two mentioned paradoxes is that they are only valid when the detectors are 100% efficient, whereas present experimental efficiency is much lower than that. Here, an approach is presented which enables a generalization of both the Bell inequality and the GHZ paradox to the inefficient case. This is done by introducing the concept of change of ensemble , which provides both qualitative and quantitative information on the nature of the "loophole" in the 100% efficiency prerequisite, and is more fundamental in this regard than the efficiency concept. Efficiency estimates are presented which are easy to obtain from experimental coincidence data, and a connection is established between these estimates and the concept of change of ensemble. The concept is also studied in the context of Franson interferometry, where the Bell inequality cannot immediately be used. Unexpected subtleties occur when trying to establish whether or not a Local Realistic model of the data is possible even in the ideal case. A Local Realistic model of the experiment is presented, but nevertheless, by introducing an additional requirement on the experimental setup it is possible to refute the mentioned model and show that no other Local Realistic model exists
Singular value computations for Toeplitz matrices and subspace tracking by Eva Lundström( Book )

3 editions published in 1998 in English and held by 5 WorldCat member libraries worldwide

Diskret matematik by Anders Björn( Book )

4 editions published between 1998 and 2000 in Swedish and held by 4 WorldCat member libraries worldwide

On the combined distribution and assignment problem by Kurt Jörnsten( Book )

2 editions published in 1978 in English and held by 4 WorldCat member libraries worldwide

Soliton methods in the theory of integrable mechanical systems by Krzysztof Marciniak( Book )

2 editions published in 1998 in English and held by 4 WorldCat member libraries worldwide

Computer-intensive methods for dependent observations by Anders Nordgaard( Book )

2 editions published in 1996 in English and held by 4 WorldCat member libraries worldwide

A pseudo column generation algorithm for log truck scheduling by Myrna Palmgren( Book )

2 editions published in 2002 in English and held by 4 WorldCat member libraries worldwide

An alternating iterative procedure for the Cauchy problem for the Helmholtz equation by Lydie Mpinganzima( )

3 editions published between 2012 and 2014 in English and held by 3 WorldCat member libraries worldwide

We present a modification of the alternating iterative method, which was introduced by V.A. Kozlov and V. Maz'ya in for solving the Cauchy problem for the Helmholtz equation in a Lipschitz domain. The method is implemented numerically using the finite difference method
Quasi-local momentum and uniqueness of black holes by Göran Bergqvist( Book )

1 edition published in 1989 in English and held by 3 WorldCat member libraries worldwide

A timedependent model for simulation of an urban bus route by Per-Åke Andersson( Book )

1 edition published in 1978 in English and held by 3 WorldCat member libraries worldwide

A note on a mathematical programming model for optimal bus frequencies by Kurt Jörnsten( Book )

1 edition published in 1979 in English and held by 3 WorldCat member libraries worldwide

Analysis of Dynamics of the Tippe Top by Nils Rutstam( )

3 editions published in 2013 in English and held by 3 WorldCat member libraries worldwide

The Tippe Top is a toy that has the form of a truncated sphere with a small peg. When spun on its spherical part on a flat supporting surface it will start to turn upside down to spin on its peg. This counterintuitive phenomenon, called inversion, has been studied for some time, but obtaining a complete description of the dynamics of inversion has proven to be a difficult problem. This is because even the most simplified model for the rolling and gliding Tippe Top is a non-integrable, nonlinear dynamical system with at least 6 degrees of freedom. The existing results are based on numerical simulations of the equations of motion or an asymptotic analysis showing that the inverted position is the only asymptotically attractive and stable position for the Tippe Top under certain conditions. The question of describing dynamics of inverting solutions remained rather intact. In this thesis we develop methods for analysing equations of motion of the Tippe Top and present conditions for oscillatory behaviour of inverting solutions. Our approach is based on an integrated form of Tippe Top equations that leads to the Main Equation for the Tippe Top (METT) describing the time evolution of the inclination angle $\theta(t)$ for the symmetry axis of the Tippe Top. In particular we show that we can take values for physical parameters such that the potential function $V(\cos\theta,D,\lambda)$ in METT becomes a rational function of $\cos\theta$, which is easier to analyse. We estimate quantities characterizing an inverting Tippe Top, such as the period of oscillation for $\theta(t)$ as it moves from a neighborhood of $\theta=0$ to a neighborhood of $\theta=\pi$ during inversion. Results of numerical simulations for realistic values of physical parameters confirm the conclusions of the mathematical analysis performed in this thesis
Lp-contractivity of semigroups generated by linear partial differential operators by Mikael Langer( Book )

2 editions published in 1997 in English and held by 3 WorldCat member libraries worldwide

Läsa matematiska texter : förståelse och lärande i läsprocessen by Magnus Österholm( Book )

3 editions published in 2004 in Swedish and held by 3 WorldCat member libraries worldwide

Denna avhandling behandlar läsning av matematiska texter; hur och vad man förstår och lär sig vid läsningen. Fokus ligger på läsprocessen , det vill säga själva läsandet av texten och vad man förstår efter att läst igenom texten. Huvudsyftet är att studera specifika aspekter i läsandet av just matematiska texter för att testa och utveckla en befintlig, allmän teori kring läsprocessen. Speciellt studeras användningen av symboler i matematiska texter och hur detta kan påverka läsprocessen. Avhandlingen byggs upp av teoretiska diskussioner kring läsning av matematiska texter samt en empirisk studie bland gymnasieelever och universitetsstuderande. De teoretiska diskussionerna utgår bland annat från en litteraturstudie kring förekommande påståenden om speciella egenskaper hos matematiska texter, och speciellt diskuteras läsning av symboler och algebraiska uttryck. Den empiriska studien (med 106 deltagare) använde tre olika texter; en historietext om ryska revolutionen samt två matematiktexter om gruppteori. Matematiktexterna behandlar samma sak som gruppteori, men skillnaden mellan dem är att den ena använder matematiska symboler i sin presentation medan den andra inte alls använder symboler. Varje deltagare fick läsa en utav matematiktexterna samt historietexterna, och fick efter varje text besvara frågor om textens innehåll. Den grupp av personer som läste matematiktexten utan symboler har bättre resultat på frågor om texten än den grupp som läste texten med symboler. Detta verkar kunna bero på oförmåga att artikulera symboler vid läsning av texten samt att avkodningsförmågan inte verkar kunna utnyttjas på samma sätt för texten med symboler. Läsning av matematiska texter med symboler är alltså ganska speciellt och man kan behöva lära sig hur man läser sådana texter. Däremot verkar det finnas många likheter med läsning av matematiska texter utan symboler och historietexten. Det matematiska innehållet verkar alltså inte i någon större omfattning påverka läsprocessen, utan hur detta innehåll presenteras är en viktig aspekt. I de teoretiska diskussionerna ges förslag på hur läsning av matematiska symboler kan infogas i den allmänna teorin för läsprocessen. Överlag finns dock ingen anledning att se läsning av matematiska texter som någon speciell typ av process som skiljer sig från läsning av andra texter. Den allmänna teorin för läsprocessen kan därmed fungera som teoretisk grund även för läsförståelse av matematiska texter, möjligen med föreslaget tillägg om matematiska symboler
Dose plan optimization in HDR brachytherapy using penalaties : properties and extensions by Åsa Holm( Book )

2 editions published in 2011 in English and held by 2 WorldCat member libraries worldwide

Asymptotic analysis of junctions in multi-structures by Jan Åslund( Book )

2 editions published in 2002 in English and held by 2 WorldCat member libraries worldwide

Some results on interval edge colorings of ([alpha], [beta])-biregular bipartite graphs by Armen S Asratian( Book )

2 editions published in 2006 in English and held by 2 WorldCat member libraries worldwide

A Riccati-based primal interior point solver for multistage stochastic programming-extensions by Jörgen Blomvall( Book )

2 editions published in 2000 in English and held by 2 WorldCat member libraries worldwide

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Alternative Names
Department of Mathematics