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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 2024 · math.SPShow all

1 paper · 2 filters

math.SP2024★ 1 cited

Perron similarities and the nonnegative inverse eigenvalue problem

Charles R. Johnson, Pietro Paparella

The longstanding nonnegative inverse eigenvalue problem (NIEP) is to determine which multisets of complex numbers occur as the spectrum of an entry-wise nonnegative matrix. Althoug…

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