Definition:Cosine Integral Function/Also denoted as
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Cosine Integral Function: Also denoted as
The cosine integral function $\map \Ci x$ is also seen denoted $\map {Ci} x$.
Sources
- 1968: Murray R. Spiegel: Mathematical Handbook of Formulas and Tables ... (previous) ... (next): $\S 35$: Miscellaneous Special Functions: Cosine Integral $\ds \map {Ci} x = \int_x^\infty \frac {\cos u} u \rd u$