AngouriMath
Ci(AngouriMath.Entity)
Method (no overloads)
Summary
The cosine integral, Ci(z) = gamma + ln z + int_0^z (cos t - 1)/t dt
Parameter "a"
The argument, any complex number but 0
Returns
The Cif node
Remarks
On x > 0 it is -int_x^oo cos(t)/t dt , real, so what int cos(x)/x dx is in
closed form. Its cut is the negative real axis, as forln , on which it is the value
from above:Ci(-x) = Ci(x) + i pi , as SymPy's, mpmath's and Mathematica's is.
https://github.com/asc-community/AngouriMath/issues/1501
closed form. Its cut is the negative real axis, as for
from above:
https://github.com/asc-community/AngouriMath/issues/1501
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