Function reference · Special functions
Li
Computes the logarithmic integral.
Li evaluates supported non-negative numeric arguments and otherwise remains symbolic. The function has a logarithmic singularity at 1.
Negative numeric inputs are retained symbolically rather than forced through a real-valued numerical approximation.
Examples
These examples use Nerdamer Notation.
Use the singular value at 1.
Li(1) // → -Inf
Keep a symbolic logarithmic integral.
Li(x)Interfaces
The same operation is available through the interfaces below.
Nerdamer Notation
Use this form inside input passed to nerdamer(...).
Li(arg1)nerdamer.Li
Call the operation through the default nerdamer import.
nerdamer.Li(x: Expression): ExpressionParameters
| Name | Type | Description |
|---|---|---|
x | Expression | The input expression. |
Returns
Expression — The logarithmic integral value.