Difference between revisions of "Cosine integral"
From specialfunctionswiki
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[[File:Ci.png|500px]] | [[File:Ci.png|500px]] | ||
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| + | =References= | ||
| + | *[http://dlmf.nist.gov/8.21 Generalized Sine and Cosine Integrals] | ||
Revision as of 05:15, 19 October 2014
The cosine integral is defined by $$\mathrm{Ci}(z) = -\displaystyle\int_z^{\infty} \dfrac{\cos t}{t} dt ; |\mathrm{arg} z|<\pi.$$
