Published by Univerzita Mateja Bela.
ISSN 1338-7111
Editor-in-chief Miroslav Haviar

1.	New descriptions of certain classes of graceful graphs
	Pages 1-18
	by S. Kurtulík
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2.	A k-dimensional systems of fractional neutral functional differential equations involving ψ-Caputo fractional derivative
	Pages 19-31
	by M. S. Shabna and M. C. Ranjini
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3.	Degree 5 polynomials and Descartes' rule of signs
	Pages 32-51
	by H. Cheriha, Y. Gati and V. P. Kostov
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4.	An accurate approximation method for solving fractional order boundary value problems
	Pages 52-67
	by M. Izadi
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5.	Recent developments on gracefulness of graphs. A survey complemented with chessboard representations
	Pages 68-94
	by K. Kotuľová and M. Haviar
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6.	Sufficiency and duality of set-valued semi-infinite programming problems under generalized cone convexity
	Pages 95-111
	by K. Das and Ch. Nahak
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7.	Extension ideals and closure operator in a 0-distributive lattice
	Pages 112-119
	by Y. S. Pawar and S. S. Khopade
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