1. The spectrum of ultraproducts of finite cardinals for an ultrafilter

   • S. Shelah

   OriginalPaper 26 June 2018 Pages: 201 - 220

2. On a generalization of the concept of S-permutable subgroup of a finite group

   • V. I. Murashka

   OriginalPaper 17 March 2018 Pages: 221 - 227

3. On abstract and almost-abstract density topologies

   • J. Hejduk
   • A. Loranty

   OriginalPaper 25 May 2018 Pages: 228 - 240

4. Solution of a problem of Z. Daróczy, J. Jarczyk and W. Jarczyk and generalization of a theorem of R. Ger and T. Kochane

   • M. Balcerowski

   OriginalPaper 24 April 2018 Pages: 241 - 247

5. Asymptotic aspect of Drygas, quadratic and Jensen functional equations in metric abelian groups

   • B. Khosravi
   • M. B. Moghimi
   • A. Najati

   OriginalPaper 17 March 2018 Pages: 248 - 265

6. Parallel covering of isosceles triangles with squares

   • M. Lu
   • Z. Su

   OriginalPaper 05 July 2018 Pages: 266 - 297

7. On the existence of periodic motions of the excited inverted pendulum by elementary methods

   • L. Csizmadia
   • L. Hatvani

   OriginalPaper 25 May 2018 Pages: 298 - 312

8. Partitions of the set of natural numbers and symplectic homology

   • I. Uljarevic

   OriginalPaper 17 March 2018 Pages: 313 - 323

9. Komlós properties in Banach lattices

   • E. Y. Emelyanov
   • N. Erkurşun-Özcan
   • S. G. Gorokhova

   OriginalPaper 26 June 2018 Pages: 324 - 331

10. Representing an isotone map between two bounded ordered sets by principal lattice congruences

    • G. Czédli

    OriginalPaper 26 June 2018 Pages: 332 - 354

11. Inequalities between Dirichlet and Neumann eigenvalues of vibrating strings

    • M.-J. Huang

    OriginalPaper 24 April 2018 Pages: 355 - 361

12. Rational approximation to surfaces defined by polynomials in one variable

    • J. Schleischitz

    OriginalPaper 25 May 2018 Pages: 362 - 375

13. Decomposition of transformations

    • M. Svistula

    OriginalPaper 17 March 2018 Pages: 376 - 392

14. Weak square and stationary reflection

    • G. Fuchs
    • A. Rinot

    OriginalPaper 22 January 2018 Pages: 393 - 405

15. On the Jayne–Rogers theorem

    • S. V. Medvedev

    OriginalPaper 24 April 2018 Pages: 406 - 415

16. Metric discrepancy results for geometric progressions with small ratios

    • K. Fukuyama
    • S. Sakaguchi
    • M. Tscheckl

    OriginalPaper 17 March 2018 Pages: 416 - 430

17. An improved upper bound for the size of a sunflower-free family

    • G. Hegedűs

    OriginalPaper 22 February 2018 Pages: 431 - 438

18. The p-Gelfand–Phillips property in spaces of operators and Dunford–Pettis like sets

    • I. Ghenciu

    OriginalPaper 25 May 2018 Pages: 439 - 457

19. A definitive improvement of a game-theoretic bound and the long tightness game

    • L. F. Aurichi
    • A. Bella

    OriginalPaper 26 June 2018 Pages: 458 - 465

20. Some new results on orthogonal polynomials for Laguerre type exponential weights

    • G. Mastroianni
    • I. Notarangelo
    • P. Vértesi

    OriginalPaper 26 May 2018 Pages: 466 - 478

21. An analogue of Sylvester’s four-point problem on the sphere

    • H. Maehara
    • H. Martini

    OriginalPaper 17 March 2018 Pages: 479 - 488

22. A remark on a theorem of Erdős

    • J. H. Schmerl

    OriginalPaper 24 April 2018 Pages: 489 - 498

23. A nilpotency criterion for finite groups

    • M. Tărnăuceanu

    OriginalPaper 24 April 2018 Pages: 499 - 501

24. On n-\({\sigma}\)-embedded subgroups of finite groups

    • C. Cao
    • M. T. Hussain
    • L. Zhang

    OriginalPaper 24 April 2018 Pages: 502 - 517

25. Second and third order moment inequalities for probability distributions

    • S. Simić

    OriginalPaper 26 June 2018 Pages: 518 - 532