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Researcher · University of Dundee · United Kingdom

Roger Fletcher

Roger Fletcher publishes mostly in Numerical Analysis, Computational Theory and Mathematics and Control and Systems Engineering, on topics such as Advanced Optimization Algorithms Research, Matrix Theory and Algorithms and Iterative Methods for Nonlinear Equations.

OpenAlex
World rank
#86,694
of 7,710,434 ranked researchers
Rank in United Kingdom
#7,464
of 367,258
Works
115
Citations
27k
Citations per work
231.1
h-index
48
i10-index 78Top 0.9% in Numerical Analysis
Roger Fletcher

What does Roger Fletcher research?

Roger Fletcher's work is mostly in Mathematics (35%), Computer Science (28%), Engineering (15%).

Physical Sciences: 90 works · 78.3% of their workMathematics: 41 works · 35.4% of their workNumerical Analysis: 37 works · 32.5% of their workApplied Mathematics: 3 works · 2.9% of their workComputer Science: 32 works · 27.5% of their workComputational Theory and Mathematics: 28 works · 24.6% of their workArtificial Intelligence: 3 works · 2.9% of their workEngineering: 18 works · 15.4% of their workControl and Systems Engineering: 10 works · 8.6% of their workComputational Mechanics: 8 works · 6.8% of their workEverything else: 25 works · 21.7% of their workTHEIR WORKRoger Fletcher115works
Physical Sciences78%

Their six largest subfields, inside their fields and domains; the grey slice is everything else they publish. The interactive view splits every one of their works down to single topics.

The fields and subfields, with their numbers
    1. Mathematics4135.4%
    2. Computer Science3227.5%
    3. Engineering1815.4%
  2. Everything else2521.7%
  1. 1Numerical Analysis32% of their works
  2. 2Computational Theory and Mathematics25% of their works
  3. 3Control and Systems Engineering9% of their works
  4. 4Computational Mechanics7% of their works
  5. 5Artificial Intelligence3% of their works
  6. 6Applied Mathematics3% of their works

Research topics

Which keywords describe Roger Fletcher's research?

The keywords of their largest research topics: Convex Optimization, Optimization Software, Semidefinite Programming, Iterative Methods, Matrix Computations, Numerical Linear Algebra, Optimization and Convergence Analysis.

Size is their works in the topics tagged with each word, from their 8 largest topics. Each links to the topic it comes from most. The words come from the keyword list OpenAlex gives each topic, not from the text of the papers, so a word can appear that none of the papers uses.

All 19 words, with their numbers
  1. Convex Optimization772 topics
  2. Optimization Software661 topic
  3. Semidefinite Programming661 topic
  4. Iterative Methods582 topics
  5. Matrix Computations411 topic
  6. Numerical Linear Algebra411 topic
  7. Optimization222 topics
  8. Convergence Analysis171 topic
  9. Newton's Method171 topic
  10. Compressed Sensing111 topic
  11. Iterative Algorithms111 topic
  12. Model Predictive Control111 topic
  13. Nonlinear Operators111 topic
  14. Nonlinear Systems111 topic
  15. Sparse Representation111 topic
  16. Floating-Point Arithmetic81 topic
  17. Interval Analysis81 topic
  18. Differential Equations61 topic
  19. Numerical Integration61 topic

Where does Roger Fletcher work?

Roger Fletcher's main affiliation in the publication record is University of Dundee, United Kingdom.

How many publications and citations does Roger Fletcher have?

OpenAlex counts 115 works and 26,581 citations for Roger Fletcher, an h-index of 48, ranking #86,694 of 7,710,434 researchers worldwide on the quality score.

Ranked on field-normalised citation excellence (50%), output (30%) and citations (20%). Counts come from OpenAlex author records, which occasionally merge different people who share a name or split one person into several.

Other researchers named Roger Fletcher

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