**32**(2005)

ISSN 1787-5021 (Print)

ISSN 1787-6117 (Online)

## Content

### Research papers:

Quadrature rules for periodic integrands. Bi-orthogonality and para-orthogonality

by Ruymán Cruz-Barroso, Leyla Daruis, Pablo González-Vera, Olav Njåstad

Pages: 5–44

Burkholder’s inequality for multiindex martingales

by István Fazekas

Pages: 45–51

A limit theorem for one-parameter alteration of two knots of B-spline curves

by Miklós Hoffmann, Imre Juhász

Pages: 53–60

Solution of a sum form equation in the two dimensional closed domain case

by Imre Kocsis

Pages: 61–78

Pointwise very strong approximation as a generalization of Fejér’s summation theorem

by Włodzimierz Łenski

Pages: 79–86

Towards a non-selfadjoint version of Kadison’s theorem

by Martin Mathieu

Pages: 87–94

Construction of ECT-B-splines, a survey

by Günter W. Mühlbach, Yuehong Tang

Pages: 95–123

A remark on Rainwater’s theorem

by Olav Nygaard

Pages: 125–127

Means of positive matrices: Geometry and a conjecture

by Dénes Petz

Pages: 129–139

Discrete spectral synthesis

by László Székelyhidi

Pages: 141–152

Note on symmetric alteration of knots of B-spline curves

by Ibolya Szilágyi

Pages: 153–157

Some special cases of a general convergence rate theorem in the law of large numbers

by Tibor Tómács

Pages: 159–166

Wiener amalgams and summability of Fourier series

by Ferenc Weisz

Pages: 167–186

### Methodological papers:

Homogeneity properties of subadditive functions

by Pál Burai, Árpád Száz

Pages: 189–201

Solving initial value problem by different numerical methods: Practical investigation

by Gábor Geda

Pages: 203–210

On the fundamental theorem of compact and noncompact surfaces

by Eszter Kónya

Pages: 211–224

Remarks on the concepts of affine transformation and collineation in teaching geometry in teachers’ training college

by István Krisztin Német

Pages: 225–236