# List of scientific constants named after people

This is a list of physical and mathematical constants named after people.[1] Eponymous constants (and other eponyms) and their influence on scientific citations have been discussed in the literature.[2][a]

• Reduced Planck constant or Dirac constant ($h$-bar, ħ) – Max Planck, Paul Dirac

## Notes and references

1. ^ The article addresses the major premise in the argument against the Ortega hypothesis: that citation counts fairly reflect the importance of scientific contributions. It presents the results of a study of eponyms in scientific literature. The result is that usually when a journal paper refers to a unit, constant, technique, device, etc. that is named after a scientist (an "eponym"), that paper will not cite the person who is the namesake of the unit, constant, technique, etc. Early papers cite it more; later papers cite it less.
1. ^ "Reflections on the Natural History of Eponymy and Scientific Law", Donald deB. Beaver, Social Studies of Science, volume 6, number 1 (February, 1976), pages 89–98. JSTOR 284787
2. ^ "Non-indexed eponymal citedness (NIEC): first fact-finding examination of a phenomenon of scientific literature." Endre Száva-Kováts. Journal of Information Science, 1994 20:55 doi:10.1177/016555159402000107