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Mirrors > Home > MPE Home > Th. List > wss | Structured version Visualization version GIF version |
Description: Extend wff notation to include the subclass relation. This is read "𝐴 is a subclass of 𝐵 " or "𝐵 includes 𝐴." When 𝐴 exists as a set, it is also read "𝐴 is a subset of 𝐵." |
Ref | Expression |
---|---|
cA | class 𝐴 |
cB | class 𝐵 |
Ref | Expression |
---|---|
wss | wff 𝐴 ⊆ 𝐵 |
Colors of variables: wff setvar class |
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