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Mirrors > Home > NFE Home > Th. List > ciin | GIF version |
Description: Extend class notation to include indexed intersection. Note: Historically (prior to 21-Oct-2005), set.mm used the notation ∩x ∈ AB, with the same intersection symbol as cint 3926. Although that syntax was unambiguous, it did not allow for LALR parsing of the syntax constructions in set.mm. The new syntax uses a distinguished symbol ∩ instead of ∩ and does allow LALR parsing. Thanks to Peter Backes for suggesting this change. |
Ref | Expression |
---|---|
vx | setvar x |
cA | class A |
cB | class B |
Ref | Expression |
---|---|
ciin | class ∩x ∈ A B |
Colors of variables: wff setvar class |
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