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[Help-gsl] Problem with qagui 1D integrator

From: Takacs Adam
Subject: [Help-gsl] Problem with qagui 1D integrator
Date: Fri, 12 Oct 2018 18:23:09 +0200
User-agent: Roundcube Webmail/1.3.7

Dear GSL Helpers,

We tried to use the qagiu algorithm to calculate the following integration

   \int_0^infty dx cosh(x) e^{-cosh(x)} ,

however qagiu falls and complains on "bad integrand behavior". If we're
using qags with a fixed big upper limit, the integral is fine.

Do you have any suggestion what could be the problem? We'd like to
use qagiu without upper limit.

Thank you for your help,
Adam Takacs

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