- See also
- References
- Further reading
In mathematics, the base-b cologarithm, sometimes shortened to colog, of a number is the base-b logarithm of the reciprocal of the number. It is equal to the negative base-b logarithm of the number:
The cologarithm in base b of a number is also equal to the logarithm of the same number having the reciprocal of b as the base:
In chemistry, a decimal cologarithm is indicated by the letter p. This usage originated with the quantity pH, defined as −log10 [H3O+]. Based on pH, the quantity pKa was later defined as −log10 Ka.
See also
- Antilogarithm
References
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Further reading
- [https://web.archive.org/web/20070216042649/http://www.merriamwebster.com/dictionary/cologarithm Merriam Webster definition of cologarithm]
- "Cologarithm." From MathWorld--A Wolfram Web Resource.
1 : Special functions
- Gillham's code
- Gillham–Gray code
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