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Topical Issue on Ulam Stability

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Ioan Rasa, Technical University of Cluj-Napoca, Romania (Ioan.Rasa@math.utcluj.ro)
Janusz Brzdęk
, Pedagogical University, Krakow, Poland (jbrzdek@up.krakow.pl)
Dorian Popa
, Technical University of Cluj-Napoca, Romania
Bing Xu
, Sichuan University, China


This thematic special issue is focused on the Ulam stability of equations and Ulam stability of operators.

Potential topics include, but are not limited to, Ulam stability of:

  • functional equations
  • difference equations
  • differential and integral equations
  • linear operators
  • operators of polynomial form

We also invite papers on connections between fixed point theory and Ulam stability.


The authors are kindly invited to register at our paper processing system at:
and submit their contribution using a special track established for this thematic issue (TI on Ulam Stability). All papers will go through the journal high standards, quick, fair and comprehensive peer-review procedure.
Instructions for authors are available online at:

Contributors to this thematic special issue will benefit from:

  • comprehensive and transparent peer review provided by experts in the field
  • no space constraints
  • free language assistance for authors from non-English speaking regions
  • immediate publication after completing the publishing process
  • Open Access for all articles
  • extensive promotion and worldwide distribution of each published article
  • long-time preservation
  • indexation in Web of Science (Emerging Sources Citation Index) and SCOPUS

The deadline for the submissions is June 30, 2018 but individual papers will be reviewed and published online on an ongoing basis.

In 2018 Demonstratio Mathematica offers 50% discount to all the authors − the publication fee amounts to 500 Euro per paper, regardless of its length.
Additionally, fees for authors who have limited access to funding for publications may be further reduced or fully waived.

For more details please refer to:
To view funding opportunities to cover APC please visit:

We are looking forward to your submission. If you have any question, please contact us at Justyna.Zuk@degruyteropen.com.