1. Zero-free neighborhoods around the unit circle for Kac polynomials

   • Gerardo Barrera
   • Paulo Manrique

   OriginalPaper Open access 07 August 2021 Pages: 159 - 176

2. Trigonometric approximation of functions in \(L_1\)-norm

   • Prem Chandra
   • Varsha Karanjgaokar

   OriginalPaper 23 July 2021 Pages: 177 - 185

3. Gorenstein projective objects in comma categories

   • Yeyang Peng
   • Rongmin Zhu
   • Zhaoyong Huang

   OriginalPaper 16 July 2021 Pages: 186 - 202

4. Sums of certain fractional parts

   • Olivier Bordellès

   OriginalPaper 04 July 2021 Pages: 203 - 210

5. Existence and Hyers–Ulam stability of solutions for a delayed hyperbolic partial differential equation

   • Canan Çelik
   • Faruk Develi

   OriginalPaper 05 July 2021 Pages: 211 - 220

   

6. On closure compatibility of ideal topological spaces and idempotency of the local closure function

   • Anika Njamcul
   • Aleksandar Pavlović

   OriginalPaper 16 July 2021 Pages: 221 - 234

   

7. Unit groups of some multiquadratic number fields and 2-class groups

   • Mohamed Mahmoud Chems-Eddin

   OriginalPaper 04 July 2021 Pages: 235 - 249

   

8. Forcing axioms and the Galvin number

   • Shimon Garti
   • Yair Hayut
   • Menachem Magidor

   OriginalPaper 06 August 2021 Pages: 250 - 258

9. Weighted least squares estimators for the Parzen tail index

   • Amenah Al-Najafi
   • László Viharos

   OriginalPaper 15 July 2021 Pages: 259 - 269

10. Characterizing linear mappings through zero products or zero Jordan products

    • Guangyu An
    • Jun He
    • Jiankui Li

    OriginalPaper 22 January 2022 Pages: 270 - 286

11. A purely exponential Diophantine equation in three unknowns

    • Takafumi Miyazaki
    • Masaki Sudo
    • Nobuhiro Terai

    OriginalPaper 10 July 2021 Pages: 287 - 298

12. Remark on the spectral synthesis on infinite joins of finite hypergroups

    • Kedumetse Vati

    OriginalPaper 06 July 2021 Pages: 299 - 302

13. Normal forms for rank two linear irregular differential equations and moduli spaces

    • Karamoko Diarra
    • Frank Loray

    OriginalPaper 07 August 2021 Pages: 303 - 320

14. Topological type of discriminants of some special families

    • Evelia R. García Barroso
    • M. Fernando Hernández Iglesias

    OriginalPaper Open access 08 September 2021 Pages: 321 - 345

    

15. The Schwarzian derivative on Finsler manifolds of constant curvature

    • B. Bidabad
    • F. Sedighi

    OriginalPaper 06 August 2021 Pages: 346 - 357

16. FGF group rings

    • Liang Shen

    OriginalPaper 04 August 2021 Pages: 358 - 360

17. Isometries between completely regular vector-valued function spaces

    • Mojtaba Mojahedi
    • Fereshteh Sady

    OriginalPaper 28 January 2022 Pages: 361 - 370