Documentation moved.This entry is now part of the unified function reference. Open the unified page → API/nerdamer APIFunctionnerdamer.Eisrc/index.ts:814nerdamer.Ei(x: Expression): ExpressionComputes the exponential integral:`Ei(x) = −∫₋ₓ^∞ e^(−t)/t dt`(Cauchy principal value). -`Ei(+∞) = +∞`,`Ei(−∞) = 0`-`Ei(0) = −∞`ParametersNameTypeDescriptionxExpressionThe input expression.ReturnsExpression — The exponential integral value.ExamplesEi(Expression.create(0)).text() // "-Infinity" Ei(Expression.create('x')).text() // "Ei(x)"
