Double integral

Hi, all, espcially mathematicians.

Could you please help me in finding a closed-form for the double integral below ?

If there is no possible closed-form, please help me bounding the fraction with logarithms with the most accurately possible. The lower bound is preferrable to the upper bound.

PS: What’s written in french means : the a parameter is positive.

Installing Maple on Fedora Core

I finally did it. Yes, it was not that easy, because of some missing librairies. After many research on the Internet, I got what I’ve want.

First of all, I tried to launch Maple from the CD but no success. No real problems until now : I had simply to copy the whole Linux-Maple directory on my home directory.

Then, I launched

./LinuxInstaller.bin

command. I got an the following error

Error: failed /home/kaiser/Temp/setup/maple/Linux/Linux/resource/jre/lib/i386/client/libjvm.so, because libstdc++-libc6.1-1.so.2: cannot open shared object file: No such file or directory

I so run

yum install libstdc++*

No way. Even with this librairy installed the error is always here. The solution is here. You have first to download libstdc++-2-libc6.1-1-2.9.0.so to /usr/lib directory and then to perform the following commands :

ln -s libstdc++-2-libc6.1-1-2.9.0.so libstdc++-libc6.1-1.so.2
ldconfig

Now, you can relaunch the LinuxInstaller.bin command and everything should be OK… Everything is almost OK. Because when you try to run

./xmaple

from the $MAPLE/bin, you could have a message

Connection to kernel lost

The solution is here. Go to directory $MAPLE/jre.IBM_LINUX/bin and perform the following operations

cp java java.orig

Replace the ancient java file by a new containing the following lines

#!/bin/bash
/opt/maple9.5/jre.IBM_INTEL_LINUX/bin/java.orig -Djava.net.preferIPv4Stack=”true” $*

Make java executable

chmod 0755 java

Enjoy Maple.

And see you soon.

PS : I would like to thank Swobodin for his help during some operations. Thank you man.

Mathematicians, enjoy !!

I discovered thanks to Bidules that it is possible to write some with wordpress. It gonna be useful, even if this feature is a small overview of what can do for typography.

 

 

 

Pour les matheux

Une erreur s’est glissée (ou plutôt a été introduite) dans ce raisonnement mathématique qui a l’air tout à fait cohérent.