Documentation for infix ⊆ assembled from the following types:

language documentation Sets, bags, and mixes

From Sets, bags, and mixes

(Sets, bags, and mixes) infix ⊆

only sub infix:<⊆>($a, $b --> Bool)

Alternate subset of or equal to operator.

Equivalent to (<=), at codepoint U+2286 (SUBSET OF OR EQUAL TO).