Limit applyed to a very long expression

• Subject: Limit applyed to a very long expression
• From: Stefano Ferri
• Date: Tue, 25 Aug 2009 22:57:51 +0200

Here there is an improved version, to avoid quotient by zero if f=0


ratlimit(f,x,l) := block([d,n,dd],
	if f=0 then 0
	else (
		d:denom(f),
		n:denom(1/f),
		dd : hipow(d,x),
		d : tlimit(x^(-dd)*d,x,l),
		n : tlimit(x^(-dd)*n,x,l),
 		n/d
	)
)$

Stefano

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