Deprecated: $wgMWOAuthSharedUserIDs=false is deprecated, set $wgMWOAuthSharedUserIDs=true, $wgMWOAuthSharedUserSource='local' instead [Called from MediaWiki\HookContainer\HookContainer::run in /var/www/html/w/includes/HookContainer/HookContainer.php at line 135] in /var/www/html/w/includes/Debug/MWDebug.php on line 372
Polynomial invariants for the equation \(\frac{d^ 2}{d\xi ^ 2}v=\lambda (\xi)\frac{d}{d\xi}v+F(\xi,v)\) - MaRDI portal