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researcher

Charles R. Johnson

30 papers hereh-index 4344k citations432 works total

Matching runs newest-first, so older work may not be attached to this profile yet.

author position
  • first author12
  • middle author9
  • last author8

Across the 29 of 30 papers where every author was matched, so the position is known.

fields
  • math.CO8
  • math.SP7
  • math.RA5
  • math.OA4
  • math.FA2
  • math-ph2
same name
  • Charles R. Johnson — 7 papers, h 5
  • Charles R. Johnson — 2 papers, h 2
  • Charles R. Johnson — 2 papers, h 2
  • Charles R. Johnson — 1 paper
  • Charles R. Johnson — 1 paper, h 0

Either other researchers who publish under this name, or the same person where the external sources have not merged their records.

identity via Semantic Scholar / OpenAlex

activity
20022026
most citedTotal positivity of sums, Hadamard products and Hadamard powers: Results and counterexamples

37 citations · 96 across the 28 of their papers we have counts for

collaborators
Showing 2019 · math.SPShow all

4 papers · 2 filters

math.SP2019

Eigenvalue Paths Arising From Matrix Paths

Eric Jankowski, Charles R. Johnson

It is known (see e.g. [2], [4], [5], [6]) that continuous variations in the entries of a complex square matrix induce continuous variations in its eigenvalues. If such a variation…

math.SP2019★ 2 cited

Spectra of Convex Hulls of Matrix Groups

Eric Jankowski, Charles R. Johnson, Derek Lim

The still-unsolved problem of determining the set of eigenvalues realized by n-by-n doubly stochastic matrices, those matrices with row sums and column sums equal to 1, has a…

math.SP2019★ 5 cited

The Doubly Stochastic Single Eigenvalue Problem: A Computational Approach

Amit Harlev, Charles R. Johnson, Derek Lim

The problem of determining DSn​, the complex numbers that occur as an eigenvalue of an n-by-n doubly stochastic matrix, has been a target of study for some time. The Perfect-…

math.SP2019

The Inverse Eigenvalue Problem for Linear Trees

Tanay Wakhare, Charles R. Johnson

We prove the sufficiency of the Linear Superposition Principle for linear trees, which characterizes the spectra achievable by a real symmetric matrix whose underlying graph is a l…

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Not affiliated with arXiv. Researcher data from Semantic Scholar (ODC-BY) and OpenAlex.