7.3.8  Sine integral function

The sine integral function is defined by

It can be shown that Si(0)=0, Si(−∞)=−π/2 and Si(+∞)=π/2. Note that Si is an odd function.

The Si command computes the sine integral function.

• Si command takes z, a complex number.
• Si(z) returns the value of the sine integral function Si(z).

Example