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GeezerVison is showing mathworld.wolfram.com — Theta Operator -- from Wolfram MathWorld

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Theta Operator

In the notation of Watson (1966),

theta=zd/(dz).

See also

Derivative

Explore with Wolfram|Alpha

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References

Watson, G. N. A Treatise on the Theory of Bessel Functions, 2nd ed. Cambridge, England: Cambridge University Press, 1966.

Referenced on Wolfram|Alpha

Theta Operator

Cite this as:

Weisstein, Eric W. "Theta Operator." From MathWorld--A Wolfram Resource. https://mathworld.wolfram.com/ThetaOperator.html

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