Sökning: "Sten Kaijser"

Visar resultat 6 - 10 av 10 avhandlingar innehållade orden Sten Kaijser.

1. 6. Reordering in Noncommutative Algebras, Orthogonal Polynomials and Operators

   Författare :John Musonda; Sergei Silvestrov; Sten Kaijser; Johan Richter; Viktor Abramov; Mälardalens högskola; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; NATURVETENSKAP; NATURAL SCIENCES; Mathematics Applied Mathematics; matematik tillämpad matematik;

   Sammanfattning : The main object studied in this thesis is the multi-parametric family of unital associative complex algebras generated by the element $Q$ and the finite or infinite set $\{S_j\}_{j\in J}$ of elements satisfying the commutation relations $S_jQ=\sigma_j(Q)S_j$, where $\sigma_j$ is a polynomial for all $j\in J$. A concrete representation is given by the operators $Q_x(f)(x)=xf(x)$ and $\alpha_{\sigma_j}(f)(x)=f(\sigma_j(x))$ acting on polynomials or other suitable functions. LÄS MER

3. 7. Speaking of Geometry : A study of geometry textbooks and literature on geometry instruction for elementary and lower secondary levels in Sweden, 1905-1962, with a special focus on professional debates

   Författare :Johan Prytz; Staffan Rodhe; Anders Öberg; Sten Kaijser; Jan van Maanen; Patricio Herbst; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematics; geometry instruction; mathematics education; Sweden; textbook; curriculum; professional; elementary school; secondary school; history of mathematics education; history of mathematics; history of education; MATEMATIK;

   Sammanfattning : This dissertation deals with geometry instruction in Sweden in the period 1905-1962. The purpose is to investigate textbooks and other literature used by teachers in elementary schools (ES) and lower secondary schools (LSS) – Folkskolan and Realskolan – connection to geometry instruction. LÄS MER

4. 8. Optimization and Estimation of Solutions of Riccati Equations

   Författare :Kibret Sigstam; Sten Kaijser; Arkadi Ponossov; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical analysis; Matematisk analys; Mathematical analysis; Analys;

   Sammanfattning : This thesis consists of three papers on topics related to optimization and estimation of solutions of Riccati equations. We are concerned with the initial value problemf'+f² =r², f(0)=0, (*)and we want to optimiseF(T)= ∫0T f(t) dtwhen r is allowed to vary over the set R(φ ) of all equimeasurable rearrangements of a decreasing function φ and its convex hull CR(φ). LÄS MER

5. 9. Vad säger matematikbetyget? : en kvantitativ studie av 2 079 elevers betyg i årskurs nio

   Författare :Staffan Stenhag; Sten Kaijser; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; MATHEMATICS; MATEMATIK; Mathematics with specialization in Mathematics Education and the History of Mathematics; Matematik med inriktning mot matematikens historia och didaktik;

   Sammanfattning : .... LÄS MER

7. 10. Interpolation of Subcouples, New Results and Applications

   Författare :Peter Sunehag; Sten Kaijser; Natan Krugljak; Uppsala universitet; []
   Nyckelord :NATURVETENSKAP; NATURAL SCIENCES; Mathematical analysis; Interpolation; Banach couple; Banach space Banach algebra; subcouple; quotient couple; Matematisk analys; Mathematical analysis; Analys;

   Sammanfattning : Suppose that X and Y are Banach couples and suppose that there is a bounded linear couple map Q from Y to X which has the property that Q restricted to the endpoint spaces is injective and the images of the endpointspaces of Y are closed in the endpoint spaces of X, then we say that Y is a subcouple of X. If F is an interpolation functor we want to know how F(Y) is related to F(X). LÄS MER