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cologneblue / CologneBlue (disabled)
modern / Modern (disabled)
monobook / MonoBook (disabled)
vector / Vector (disabled)

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You probably installed from git, or directly from the source code using some other method. This is expected. Try installing some skins from mediawiki.org's skin directory, by:

Downloading the tarball installer, which comes with several skins and extensions. You can copy and paste the skins/ directory from it.
Cloning one of the mediawiki/skins/* repositories via git into the skins/ directory of your MediaWiki installation.

Doing this should not interfere with your git repository if you're a MediaWiki developer.

If you have just upgraded MediaWiki: MediaWiki 1.24 and newer no longer automatically enables installed skins (see Manual: Skin autodiscovery). You can paste the following lines into LocalSettings.php to enable all currently installed skins:

require_once "$IP/skins/CologneBlue/CologneBlue.php";
require_once "$IP/skins/Modern/Modern.php";
require_once "$IP/skins/MonoBook/MonoBook.php";
require_once "$IP/skins/Vector/Vector.php";

If you have just modified LocalSettings.php: Double-check the skin names for typos.

User:Eotvos

Before i was corrupted by the world

Someone on internet knows me as Eotvos, others know me as tetrapharmakon. However my best avatar is killing_buddha.

I am an italian mathematician living in Padua, where I was born in May 23, 1987. My scientific intersts are pretty wide, I spend much time reading about category theory, universal algebra, differential geometry. I've ever been fascinated by the epistemological problem of figuration of space.

I try to type some mathematical text:

<m>\displaystyle \bigwedge(V):=T_\bullet(V)/\langle v\otimes v\rangle</m> is thy Lord

Retrieved from "http://wiki.devicerandom.org/index.php?title=User:Eotvos&oldid=205"

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User:Eotvos

<m>\displaystyle \bigwedge(V):=T_\bullet(V)/\langle v\otimes v\rangle</m> is thy Lord