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BESSELJ(j, x) returns the value of jth-order Bessel function of the first kind for argument value x where x>0.  If j=0, this function automatically calls the BESSEL_J0 function.


Note that the BESSEL_J0 and BESSEL_J1 functions provide values for the zeroth and first order integer Bessel functions and allows values of x to be as low as -3.



Mathematical Functions