Category:Cosine Integral Function

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This category contains results about Cosine Integral Function.


The cosine integral function is the real function $\Ci: \R_{>0} \to \R$ defined as:

$\map \Ci x = \displaystyle \int_{t \mathop = x}^{t \mathop \to +\infty} \frac {\cos t} t \rd t$