Spherical cow

Source: Wikipedia, the free encyclopedia.
Comic of a spherical cow as illustrated by a 1996 meeting of the American Astronomical Association, in reference to astronomy modeling

The spherical cow is a

scientific models of complex phenomena.[1][2][3][4] Originating in theoretical physics, the metaphor refers to physicists' tendency to develop toy models
that reduce a problem to the simplest form imaginable, making calculations more feasible, even if the simplification hinders the model's application to reality.

The metaphor and variants have subsequently been used in other disciplines.

History

The phrase comes from a joke that spoofs the simplifying assumptions sometimes used in theoretical physics.[5]

Milk production at a dairy farm was low, so the farmer wrote to the local university, asking for help from academia. A multidisciplinary team of professors was assembled, headed by a theoretical physicist, and two weeks of intensive on-site investigation took place. The scholars then returned to the university, notebooks crammed with data, where the task of writing the report was left to the team leader. Shortly thereafter the physicist returned to the farm, saying to the farmer, "I have the solution, but it works only in the case of spherical cows in a vacuum."

It is told in many variants,[6] including a joke about a physicist who said he could predict the winner of any race provided it involved spherical horses moving through a vacuum.[7][8] A 1973 letter to the editor in the journal Science describes the "famous story" about a physicist whose solution to a poultry farm's egg-production problems began with "Postulate a spherical chicken".[9]

Cultural references

A GIF of a spherical cow.
A GIF of a homotopy from a spherical cow to a more typical one
A drawing of a spherical cow on skis, with the text Approksimoidaan pyöreä lehmä (Finnish for "We approximate a spherical cow").

The concept is familiar enough that the phrase is sometimes used as shorthand for the entire issue of proper modeling. For example, Consider a Spherical Cow is a 1988 book about problem solving using simplified models.

paper on the systemic errors introduced by simplifying assumptions about spherical symmetries in galactic dark-matter haloes was titled "Milking the spherical cow – on aspherical dynamics in spherical coordinates".[11]

References to the joke appear even outside the field of scientific modeling. "Spherical Cow" was chosen as the code name for the

The Cooper-Hofstadter Polarization" episode.[13] In the space gravity simulator educational video game Universe Sandbox, a spherical cow was added as a user-placeable object in March 2023.[14]

See also

References

  1. ^ Shelton, Robin; Cliffe, J. Allie. "Spherical Cows". Supernova Remnant Group. NASA Goddard Space Flight Center. Archived from the original on 9 October 1999.
  2. ^ Kaiser, David (2014-04-25). "The Sacred, Spherical Cows of Physics". Nautilus Quarterly.
  3. Carroll, Sean. "How spherical-cow philosophy makes hard physics problems easy". New Scientist
    . Retrieved 2023-04-27.
  4. ISSN 1059-1028
    . Retrieved 2023-04-27.
  5. ^ Lee, Timothy B. (September 4, 2013). "The Coase Theorem is widely cited in economics. Ronald Coase hated it". The Washington Post.
  6. ^ Kirkman, T. W. (1996). "Spherical Cow: A Simple Model". Statistics to Use. Retrieved 2007-02-19.
  7. ISBN 978-0-387-76577-8
    . Retrieved 28 September 2011.
  8. ISBN 978-3-642-00482-7
    . Retrieved 1 September 2012.
  9. S2CID 29103654
    . Retrieved 18 Feb 2017.
  10. ISBN 978-0-935702-58-3
    .
  11. doi:10.1093/mnras/stv1032
    . Retrieved 6 December 2022.
  12. ^ Larabel, Michael (2012-05-01). "Fedora 18 Is Codenamed The Spherical Cow". Phoronix. Retrieved 2023-06-06.
  13. ^ Huva, Amy. "When nerds go viral". Earth Matters. The Vancouver Observer. Archived from the original on 2019-12-05.
  14. ^ "A Comet, an Asteroid, and a Planet Walk into the Solar System | Update 32.2". Universe Sandbox. 2023-03-23. Retrieved 2023-03-27.

External links

Retrieved from "https://en.wikipedia.org/w/index.php?title=Spherical_cow&oldid=1232033333"