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Sotiris K. Ntouyas

Sotiris K. Ntouyas

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Mathematics
Greece
2026

D-Index & Metrics

Mathematics

D-Index
57
Citations
14616
World Ranking
684
National Ranking
3

Sotiris K. Ntouyas publication distribution in Mathematics in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Mathematics in 2026. The highlighted bar marks where Sotiris K. Ntouyas sits on this spectrum.

42–46 publications: 3 scientists 47–51 publications: 5 scientists 52–56 publications: 7 scientists 57–61 publications: 20 scientists 62–66 publications: 14 scientists 67–71 publications: 25 scientists 72–76 publications: 19 scientists 77–81 publications: 35 scientists 82–86 publications: 50 scientists 87–91 publications: 60 scientists 92–96 publications: 86 scientists 97–101 publications: 84 scientists 102–106 publications: 83 scientists 107–111 publications: 90 scientists 112–116 publications: 99 scientists 117–121 publications: 90 scientists 122–126 publications: 91 scientists 127–131 publications: 109 scientists 132–136 publications: 110 scientists 137–141 publications: 98 scientists 142–146 publications: 112 scientists 147–151 publications: 102 scientists 152–156 publications: 88 scientists 157–161 publications: 106 scientists 162–166 publications: 83 scientists 167–171 publications: 102 scientists 172–176 publications: 77 scientists 177–181 publications: 81 scientists 182–186 publications: 78 scientists 187–191 publications: 71 scientists 192–196 publications: 92 scientists 197–201 publications: 64 scientists 202–206 publications: 69 scientists 207–211 publications: 64 scientists 212–216 publications: 62 scientists 217–221 publications: 58 scientists 222–226 publications: 53 scientists 227–231 publications: 50 scientists 232–236 publications: 46 scientists 237–241 publications: 46 scientists 242–246 publications: 46 scientists 247–251 publications: 43 scientists 252–256 publications: 29 scientists 257–261 publications: 45 scientists 262–266 publications: 30 scientists 267–271 publications: 33 scientists 272–276 publications: 34 scientists 277–281 publications: 30 scientists 282–286 publications: 31 scientists 287–291 publications: 21 scientists 292–296 publications: 34 scientists 297–301 publications: 26 scientists 302–306 publications: 10 scientists 307–311 publications: 17 scientists 312–316 publications: 23 scientists 317–321 publications: 13 scientists 322–326 publications: 16 scientists 327–331 publications: 26 scientists 332–336 publications: 13 scientists 337–341 publications: 13 scientists 342–346 publications: 16 scientists 347–351 publications: 17 scientists 352–356 publications: 12 scientists 357–361 publications: 18 scientists 362–366 publications: 18 scientists 367–371 publications: 9 scientists 372–376 publications: 11 scientists 377–381 publications: 8 scientists 382–386 publications: 8 scientists 387–391 publications: 9 scientists 392–396 publications: 9 scientists 397–401 publications: 8 scientists 402–406 publications: 11 scientists 407–411 publications: 6 scientists 412–416 publications: 6 scientists 417–421 publications: 9 scientists 422–426 publications: 8 scientists 427–431 publications: 5 scientists 432–436 publications: 8 scientists 437–441 publications: 8 scientists 442–446 publications: 4 scientists 447–451 publications: 4 scientists 452–456 publications: 4 scientists 457–461 publications: 2 scientists 462–466 publications: 2 scientists 467–471 publications: 4 scientists 472–476 publications: 3 scientists 477–481 publications: 3 scientists 482–486 publications: 6 scientists 487–491 publications: 3 scientists 492–496 publications: 5 scientists 497–501 publications: 5 scientists 502–506 publications: 1 scientists 507–511 publications: 6 scientists 512–516 publications: 4 scientists 517–521 publications: 1 scientists 522–526 publications: 3 scientists 527–531 publications: 1 scientists 532–536 publications: 4 scientists 537+ publications: 100 scientists
42 publications 537+

This scientist: 586 publications — 98th percentile

98% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 537 publications or more.

Sotiris K. Ntouyas D-index placement in Mathematics in 2026

The chart shows the D-index (discipline H-index) distribution of Mathematics scientists ranked by Research.com in 2026. The highlighted bar marks where Sotiris K. Ntouyas sits on this spectrum.

30 D-Index: 174 scientists 31 D-Index: 151 scientists 32 D-Index: 174 scientists 33 D-Index: 117 scientists 34 D-Index: 136 scientists 35 D-Index: 127 scientists 36 D-Index: 145 scientists 37 D-Index: 153 scientists 38 D-Index: 150 scientists 39 D-Index: 150 scientists 40 D-Index: 138 scientists 41 D-Index: 136 scientists 42 D-Index: 93 scientists 43 D-Index: 108 scientists 44 D-Index: 115 scientists 45 D-Index: 112 scientists 46 D-Index: 103 scientists 47 D-Index: 75 scientists 48 D-Index: 59 scientists 49 D-Index: 67 scientists 50 D-Index: 60 scientists 51 D-Index: 57 scientists 52 D-Index: 59 scientists 53 D-Index: 62 scientists 54 D-Index: 60 scientists 55 D-Index: 50 scientists 56 D-Index: 42 scientists 57 D-Index: 54 scientists 58 D-Index: 50 scientists 59 D-Index: 42 scientists 60 D-Index: 41 scientists 61 D-Index: 35 scientists 62 D-Index: 40 scientists 63 D-Index: 21 scientists 64 D-Index: 31 scientists 65 D-Index: 27 scientists 66 D-Index: 29 scientists 67 D-Index: 19 scientists 68 D-Index: 25 scientists 69 D-Index: 17 scientists 70 D-Index: 18 scientists 71 D-Index: 12 scientists 72 D-Index: 14 scientists 73 D-Index: 13 scientists 74 D-Index: 18 scientists 75 D-Index: 9 scientists 76 D-Index: 11 scientists 77 D-Index: 10 scientists 78 D-Index: 9 scientists 79 D-Index: 16 scientists 80 D-Index: 12 scientists 81 D-Index: 10 scientists 82 D-Index: 5 scientists 83 D-Index: 5 scientists 84 D-Index: 13 scientists 85 D-Index: 6 scientists 86+ D-Index: 99 scientists
30 D-Index 86+

This scientist: 57 D-Index — 82nd percentile

82% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 86 D-Index or more.

Research.com Recognitions

  • 2026 - Research.com Mathematics in Greece Leader Award
  • 2025 - Research.com Mathematics in Greece Leader Award
  • 2023 - Research.com Mathematics in Greece Leader Award

Overview

Sotiris K. Ntouyas is affiliated with the University of Ioannina in Greece, actively contributing to the field of mathematics. Their research centers on applied mathematics with particular focus on nonlinear differential equations, fractional differential equations, and the analysis of boundary value problems.

The body of their work encompasses a number of subfields including applied mathematics, modeling and simulation, numerical analysis, geometry and topology, as well as mechanics of materials. These areas reflect a broad yet interconnected research portfolio within mathematical sciences.

The main topics addressed in their research include the following:

  • Nonlinear Differential Equations Analysis
  • Fractional Differential Equations Solutions
  • Differential Equations and Boundary Problems
  • Differential Equations and Numerical Methods
  • Mathematical Inequalities and Applications
  • Mathematical Functions and Polynomials
  • Functional Equations Stability Results

The recent scholarly publications featuring contributions from Sotiris K. Ntouyas include:

  • Nonlocal boundary value problems for Hilfer-type pantograph fractional differential equations and inclusions, 2020, Advances in Difference Equations
  • A study of coupled systems of mixed order fractional differential equations and inclusions with coupled integral fractional boundary conditions, 2020, Advances in Difference Equations
  • Qualitative Study on Solutions of a Hadamard Variable Order Boundary Problem via the Ulam-Hyers-Rassias Stability, 2021, Fractal and Fractional
  • Existence and stability results for -Hilfer fractional integro-differential equation with mixed nonlocal boundary conditions, 2021, AIMS Mathematics
  • Boundary Value Problems for Hilfer Fractional Differential Inclusions with Nonlocal Integral Boundary Conditions, 2020, Mathematics

The scientist's collaboration network includes frequent co-authors such as Jessada Tariboon, Bashir Ahmad, Ahmed Alsaedi, Kamsing Nonlaopon, and Ayub Samadi, indicating sustained collaborative research efforts.

The venues where this researcher regularly publishes reflect their area of expertise and include Mathematics, AIMS Mathematics, Axioms, Fractal and Fractional, and Symmetry. These journals feature multiple works by the scientist, highlighting a consistent contribution to these scholarly platforms.

In addition to articles, they have authored a book titled Nonlocal Nonlinear Fractional-Order Boundary Value Problems published by World Scientific in 2020, further contributing to the academic literature in fractional calculus and boundary value problems.

Best Publications

  • Impulsive Differential Equations and Inclusions

    Mouffak Benchohra;Johnny Henderson;Sotiris K. Ntouyas

  • Existence results for fractional order functional differential equations with infinite delay

    M. Benchohra;J. Henderson;S.K. Ntouyas;A. Ouahab

  • Boundary value problems for differential equations with fractional order and nonlocal conditions

    M. Benchohra;S. Hamani;S.K. Ntouyas

  • Hadamard-Type Fractional Differential Equations, Inclusions and Inequalities

    Bashir Ahmad;Ahmed Alsaedi;Sotiris K. Ntouyas;Jessada Tariboon

  • Quantum calculus on finite intervals and applications to impulsive difference equations

    Jessada Tariboon;Sotiris K Ntouyas

  • BOUNDARY VALUE PROBLEMS FOR DIFFERENTIAL EQUATIONS WITH FRACTIONAL ORDER

    Mouffak Benchohra;Samira Hamani;Sotiris K. Ntouyas

  • Global Existence for Semilinear Evolution Equations with Nonlocal Conditions

    S.K. Ntouyas;P.Ch. Tsamatos

  • Quantum integral inequalities on finite intervals

    Jessada Tariboon;Sotiris K Ntouyas

  • Solvability of an m-Point Boundary Value Problem for Second Order Ordinary Differential Equations

    C.P. Gupta;S.K. Ntouyas;P.C. Tsamatos

  • New Existence Results for Nonlinear Fractional Differential Equations with Three-Point Integral Boundary Conditions

    Bashir Ahmad;SotirisK K Ntouyas;Ahmed Alsaedi

  • Existence results for nonlocal boundary value problems of nonlinear fractional q-difference equations

    Bashir Ahmad;Sotiris K Ntouyas;Ioannis K Purnaras

  • Quantum integral inequalities for convex functions

    Weerawat Sudsutad;Sotiris K. Ntouyas;Jessada Tariboon

  • A fully Hadamard type integral boundary value problem of a coupled system of fractional differential equations

    Bashir Ahmad;Sotiris K. Ntouyas

  • New concepts of fractional quantum calculus and applications to impulsive fractional q-difference equations

    Jessada Tariboon;Sotiris K Ntouyas;Praveen Agarwal

  • On a coupled system of fractional differential equations with coupled nonlocal and integral boundary conditions

    Bashir Ahmad;Sotiris K. Ntouyas;Sotiris K. Ntouyas;Ahmed Alsaedi

  • On an m -point boundary-value problem for second-order ordinary differential equations

    Chaitan P. Gupta;S. K. Ntouyas;P. Ch. Tsamatos

  • Existence results for a coupled system of Caputo type sequential fractional differential equations with nonlocal integral boundary conditions

    Bashir Ahmad;Sotiris K. Ntouyas

  • Existence results for nonlocal boundary value problems of fractional differential equations and inclusions with strip conditions

    Bashir Ahmad;Sotiris K Ntouyas

  • Existence results for hybrid fractional integro-differential equations

    Surang Sitho;Sotiris K Ntouyas;Sotiris K Ntouyas;Jessada Tariboon

  • Controllability for neutral stochastic functional differential inclusions with infinite delay in abstract space

    P. Balasubramaniam;S.K. Ntouyas

  • Nonlocal Cauchy Problems for Neutral Functional Differential and Integrodifferential Inclusions in Banach Spaces

    M. Benchohra;S.K. Ntouyas

Frequent Co-Authors

Bashir Ahmad
Bashir Ahmad King Abdulaziz University
Jessada Tariboon
Jessada Tariboon King Mongkut's University of Technology North Bangkok
Mouffak Benchohra
Mouffak Benchohra Université Djillali Liabes
Ravi P. Agarwal
Ravi P. Agarwal Florida Institute of Technology
Johnny Henderson
Johnny Henderson Baylor University
Praveen Agarwal
Praveen Agarwal Anand International College of Engineering, Jaipur
Donal O'Regan
Donal O'Regan University of Galway
Hari M. Srivastava
Hari M. Srivastava University of Victoria
Pagavathigounder Balasubramaniam
Pagavathigounder Balasubramaniam Gandhigram Rural Institute
Reza Saadati
Reza Saadati Iran University of Science and Technology

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