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Engineering function
BESSELY
Returns the Bessel function Yn(x).
Rarely usedDifficulty 1600 · ExpertUsage rank #514 of 520
When to use it
The Bessel function of the second kind, Yn(x), also called the Weber or Neumann function.
The shape of it
- Syntax
=BESSELY(x, n)
Worked examples
Order one
=BESSELY(2.5,1) → 0.145918138
Order 1 at 2.5.
Order zero
=BESSELY(1,0) → 0.088256964
Order 0 at 1.
Larger x
=BESSELY(2,0) → 0.510375673
Order 0 at 2.
Worth knowing
- Goes to minus infinity as x approaches 0.
- Pairs with BESSELJ as the second solution of Bessel's equation.
- Order is truncated.
Where it goes wrong
- #NUM! for x of 0 or less, or a negative order.
- #VALUE! for non-numeric input.
Related
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