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Limit and Abs

  • To: mathgroup at smc.vnet.net
  • Subject: [mg31194] Limit and Abs
  • From: "Oliver Friedrich" <oliver.friedrich at tz-mikroelektronik.de>
  • Date: Wed, 17 Oct 2001 05:35:16 -0400 (EDT)
  • Sender: owner-wri-mathgroup at wolfram.com

Hallo,

if I evaluate
Limit[Cot[a]/(Cot[a]+2),a->Infinity]
i get the correct answer.

But I want to evaluate

Limit[Abs[Cot[a]]/(Abs[Cot[a]]+2),n->Infinity]

and that's being returned unevaluated. Help states, that Limit will return
expressions unevaluated, if there are functions with unknown behaviour (Abs
unknown ??) so I'm not too surprised or disappointed.
But anyway, how can I workaround or bypass this problem, maybe an option or
another function in the extra packages ?

Thanks

Oliver Friedrich



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