nerdamer.Chi(x: Expression): Expression
Computes the hyperbolic cosine integral: Chi(x) = γ + ln(x) + ∫₀ˣ (cosh(t)−1)/t dt,
where γ is the Euler–Mascheroni constant.
- Chi(±∞) = +∞
- Chi(0) = −∞
- The function is even for the principal branch: Chi(-x) = Chi(x).
Parameters
| Name | Type | Description |
|---|
x | Expression | The input expression. |
Returns
Expression — The hyperbolic cosine integral value.
Examples
Chi(Expression.create('x')).text() // "Chi(x)"
