World's Best Scientists 2026 revealed!

D-Index & Metrics

Mathematics

D-Index
48
Citations
49158
World Ranking
1169
National Ranking
90

Engineering and Technology

D-Index
47
Citations
48899
World Ranking
4712
National Ranking
307

Roger Fletcher 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 Roger Fletcher 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: 101 publications — 11th percentile

11% of scientists in this discipline score the same or lower.

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

Roger Fletcher 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 Roger Fletcher 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: 48 D-Index — 67th percentile

67% of scientists in this discipline score the same or lower.

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

Overview

Roger Fletcher was affiliated with the University of Dundee in the United Kingdom. Their academic career was connected to this institution, where they presumably engaged in research and teaching activities.

Details of Roger Fletcher's publication record indicate no documented recent papers, co-authors, or frequent publication venues available for review. There is also no specific information about main or subfields of study, or topics related to their research work.

Information regarding book publications or awards received by Roger Fletcher is not available from the provided data. This absence extends to the listing of any notable research contributions or recognitions during their career.

Roger Fletcher is deceased. The available information primarily situates them within the University of Dundee, with limited additional data on their scientific outputs or collaborations.

Best Publications

  • Practical Methods of Optimization

    Roger Fletcher

  • A Rapidly Convergent Descent Method for Minimization

    R. Fletcher;M. J. D. Powell

  • Function minimization by conjugate gradients

    R. Fletcher;C. M. Reeves

  • Practical Methods of Optimization.

    Christoph Witzgall;R. Fletcher

  • A new approach to variable metric algorithms

    R. Fletcher

  • Nonlinear programming without a penalty function

    Roger Fletcher;Sven Leyffer

  • Conjugate gradient methods for indefinite systems

    R. Fletcher

  • Solving mixed integer nonlinear programs by outer approximation

    Roger Fletcher;Sven Leyffer

  • On the Global Convergence of a Filter--SQP Algorithm

    Roger Fletcher;Sven Leyffer;Philippe L. Toint

  • Global Convergence of a Trust-Region SQP-Filter Algorithm for General Nonlinear Programming

    Roger Fletcher;Nicholas I. M. Gould;Sven Leyffer;Philippe L. Toint

  • Projected Barzilai-Borwein methods for large-scale box-constrained quadratic programming

    Yu-Hong Dai;Roger Fletcher

  • Local Convergence of SQP Methods for Mathematical Programs with Equilibrium Constraints

    Roger Fletcher;Sven Leyffer;Danny Ralph;Stefan Scholtes

  • On the Barzilai-Borwein Method

    Roger Fletcher

  • Numerical Experience with Lower Bounds for MIQP Branch-And-Bound

    Roger Fletcher;Sven Leyffer

  • Solving mathematical programs with complementarity constraints as nonlinear programs

    Roger Fletcher;Sven Leyffer

  • Function Minimization Without Evaluating Derivatives—a Review

    R. Fletcher

  • New algorithms for singly linearly constrained quadratic programs subject to lower and upper bounds

    Yu-Hong Dai;Roger Fletcher

  • On the global convergence of an SLP-filter algorithm that takes EQP steps

    Choong Ming Chin;Roger Fletcher

  • An Ideal Penalty Function for Constrained Optimization

    Unknown

  • An exact penalty function for nonlinear programming with inequalities

    Roger Fletcher

  • New iterative methods for solution of the eigenproblem

    W. W. Bradbury;R. Fletcher

Frequent Co-Authors

Sven Leyffer
Sven Leyffer Argonne National Laboratory
Philippe L. Toint
Philippe L. Toint University of Namur
Yu-Hong Dai
Yu-Hong Dai Chinese Academy of Sciences
Nicholas I. M. Gould
Nicholas I. M. Gould Rutherford Appleton Laboratory
Arieh Iserles
Arieh Iserles University of Cambridge
M. J. D. Powell
M. J. D. Powell University of Cambridge

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