lean2/tests/lean/run/class3.lean
2014-10-03 09:09:27 -07:00

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import logic data.prod
open prod inhabited
section
parameter {A : Type}
parameter {B : Type}
parameter Ha : inhabited A
parameter Hb : inhabited B
-- The section mechanism only includes parameters that are explicitly cited.
-- So, we use the 'including' expression to make explicit we want to use
-- Ha and Hb
include Ha Hb
theorem tst : inhabited (Prop × A × B)
end
(*
print(get_env():find("tst"):value())
*)