CBES
PURPOSE: to calculate the quantity B01 where
METHOD: If the absolute value of the argument for the Bessel function is less than 12, B01 is calculated via the power series expansion for the Bessel function in the DO LOOP ending at statement 3. If greater than 12, the asymptotic expression is utilized at statement 4. If the magnitude of the complex part of the argument for the Bessel function is greater than 20, B01 is set to (0.0,-1.0). if the complex part of the argument is negative, the sign of B01 is changed prior to returning to the calling program.
CALLED BY: SGANT
CALLS TO: NONE
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Last modified on: 3 Nov 2007