Page "Bessel function" Paragraph 93
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where Z denotes J, Y, H < sup >( 1 )</ sup >, or H < sup >( 2 )</ sup >.
( These two identities are often combined, e. g. added or subtracted, to yield various other relations.
) In this way, for example, one can compute Bessel functions of higher orders ( or higher derivatives ) given the values at lower orders ( or lower derivatives ).
In particular, it follows that:
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