lean2/tests/lean/hott/rw_binders.hlean

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import types.eq
open eq
variables {A : Type} {a1 a2 a3 : A}
definition my_transport_eq_l (p : a1 = a2) (q : a1 = a3)
: transport (λx, x = a3) p q = p⁻¹ ⬝ q :=
begin
rewrite eq_transport_l,
end