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
DLMF:21.7#Ex3 - MaRDI portal

DLMF:21.7#Ex3 (Q7595)

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DLMF:21.7#Ex3
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    a j b k = δ j , k . subscript 𝑎 𝑗 subscript 𝑏 𝑘 Kronecker 𝑗 𝑘 {\displaystyle{\displaystyle a_{j}\circ b_{k}=\delta_{j,k}.}}
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