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
Littlewood-Paley theory for the differential operator \(\frac {\partial ^{2}}{\partial x_{1}^{2}} \frac{\partial ^{2}}{\partial x_{2}^{2}} - \frac{\partial ^{2}}{\partial x_{3}^{2}}\) - MaRDI portal