External module "math/base/special/spence/docs/types/index.d"

Export assignment spence

• spence(x: number): number

• Evaluates Spence’s function, which is also known as the dilogarithm.

  Parameters

  • x: number

    input value

  Returns number

  function value

  Example

  var v = spence( 3.0 );
  // returns ~-1.437

  Example

  var v = spence( 0.0 );
  // returns ~1.645

  Example

  var v = spence( -9.0 );
  // returns NaN

  Example

  var v = spence( NaN );
  // returns NaN