Documentation for infix ⊅ assembled from the following types:

language documentation Sets, bags, and mixes

From Sets, bags, and mixes

(Sets, bags, and mixes) infix ⊅

Returns True if $a is not a strict superset of $b, else False. More information, Wikipedia definition.

language documentation Operators

From Operators

(Operators) infix ⊅

multi sub infix:<⊅>($a,$b --> Bool:D)

Not a superset of operator.

Returns True if $a is not a strict superset of $b. Equivalent to !(>).

say (1,2,3) ⊅ (2,3,1); # OUTPUT: «True␤» 
say (1,2,3) ⊅ (2,3); # OUTPUT: «False␤» 
say 4 !(>) (1,2,3); # OUTPUT: «True␤» 

⊅ is codepoint U+2285 (NOT A SUPERSET OF).