Researches in Mathematics

Kofanov, V.A., Oles Honchar Dnipro National University, Ukraine

• Vol 26 (2018) - Articles
  Bojanov-Naidenov problem for positive (negative) parts of differentiable functions on the real domain
  Abstract  PDF (Русский)
• Vol 26 (2018) - Articles
  Inequalities of various metrics for the norms $$$\|x\|_{p,\delta} = \sup \bigl\{ \| x \|_{L_p[a,b]} \colon a,b\in \mathbb{R}, b-a\leqslant \delta \bigr\}$$$ of differentiable functions on the real domain
  Abstract  PDF (Русский)
• Vol 27, No 1 (2019) - Articles
  The Bojanov-Naidenov problem for trigonometric polynomials and periodic splines
  Abstract  PDF
• Vol 27, No 1 (2019) - Articles
  Extremal problems for non-periodic splines on real domain and their derivatives
  Abstract  PDF (Українська)
• Vol 28, No 1 (2020) - Articles
  Sharp Nagy type inequalities for the classes of functions with given quotient of the uniform norms of positive and negative parts of a function
  Abstract  PDF
• Vol 29, No 1 (2021) - Articles
  Sharp inequalities of various metrics on the classes of functions with given comparison function
  Abstract  PDF
• Vol 30, No 1 (2022) - Articles
  Strengthening the Comparison Theorem and Kolmogorov Inequality in the Asymmetric Case
  Abstract  PDF
• Vol 31, No 1 (2023) - Articles
  A sharp Remez type inequalities for the functions with asymmetric restrictions on the oldest derivative
  Abstract  PDF
• Vol 32, No 2 (2024) - Articles
  Vladyslav Fedorovych Babenko (to 75th anniversary)
  Abstract  PDF (Українська)
• Vol 32, No 2 (2024) - Articles
  Kolmogorov-type inequalities for functions with asymmetric restrictions on the highest derivative
  Abstract  PDF
• Vol 33, No 2 (2025) - Articles
  Boyanov-Naydenov problem and Kolmogorov type inequalities for positive (negative) parts of functions
  Abstract  PDF

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ISSN (Online): 2664-5009

ISSN (Print): 2664-4991