Documentation moved.This entry is now part of the unified function reference. Open the unified page → API/nerdamer APIFunctionnerdamer.Cisrc/index.ts:809nerdamer.Ci(x: Expression): ExpressionComputes the cosine integral:`Ci(x) = γ + ln(x) + ∫₀ˣ (cos(t)−1)/t dt`, where γ is the Euler–Mascheroni constant. -`Ci(+∞) = 0`,`Ci(−∞) = 0`-`Ci(0) = −∞`- The function is even for the principal branch:`Ci(-x) = Ci(x)`.ParametersNameTypeDescriptionxExpressionThe input expression.ReturnsExpression — The cosine integral value.ExamplesCi(Expression.create('x')).text() // "Ci(x)"