Volume 46, No. 2.
Serdica Mathematical Journal

Table of contents

1. A note on double Fourier coefficients

   Kiran N. Darji, Rajendra G. Vyas

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2. The center of the total ring of fractions

   Oswaldo Lezama, Helbert Venegas

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3. Modulo q greatest common divisor algorithms

   Sándor Szabó

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4. Hyperbolic polynomials and canonical sign patterns

   Vladimir Petrov Kostov

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5. Quasi-minimal Lorentz surfaces in pseudo-euclidean 4-space with neutral metric

   Velichka Milousheva, Yana Aleksieva

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6. On 3-distance spherical 5-designs

   Peter Boyvalenkov, Navid Safaei

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7. Leibniz algebras whose subalgebras are left ideals

   Leonid Andreevich Kurdachenko, Igor Yakov Subbotin, Viktoriia S. Yashchuk

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8. Metric dimension of ultrametric spaces

   Bogdana Oliynyk, Bogdan Ponomarchuk

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