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sym.digamma
Computes the digamma function of a symbolic expression.
Syntax
sym.digamma(x)
Description
Computes the digamma function of a symbolic expression. The digamma function ψ(x) is the logarithmic derivative of the gamma function: ψ(x) = d/dx ln(Γ(x)) = Γ'(x)/Γ(x). It is also known as the psi function.
Parameters
| Name | Description |
|---|---|
| x | - The argument (as a symbolic expression). |
Returns
Expr