The Jacobian function dn.
This functionality does not run in MATLAB.
jacobiDN (u, m)
Let . Then the Jacobian function DN is defined as follows:
The Jacobian functions are defined for complex values of u and m.
The Jacobian functions are meromorphic and doubly periodic with periods and with respect to u.
For m = 0 and m = 1, the Jacobian functions reduce to trigonometric or constant functions.
If one argument is a floating-point number, and the other one can be converted to a floating-point number, then a floating-point number is returned.
When called with floating-point arguments, these functions are sensitive to the environment variable DIGITS which determines the numerical working precision.
For most arguments, the Jacobian functions return themselves unevaluated:
Floating point numbers are returned if at least one of the arguments is a floating-point number:
Floating point evaluation can be enforced by using float:
For m = 0 and m = 1, the result is expressed using a trigonometric function: