R:(A*
A*Prop).
(EquivRel x,y:A*. x R y) 
(x,y,z:A*. (x R y) ((z @ x) R (z @ y)))
(g:((x,y:A*//(x R y))
). Refl(x,y:A*//(x R y);u,v.u Rg v))
lquo_rel_refl
a:T. E(a;a)
Thm* R:(A*A*Prop).
(EquivRel x,y:A*. x R y)
(x,y,z:A*. (x R y) ((z @ x) R (z @ y)))
(g:((x,y:A*//(x R y))). Refl(x,y:A*//(x R y);u,v.u Rg v))
lquo_rel_refl
Thm* L:LangOver(A). Refl(A*;x,y.x L-induced Equiv y) lang_rel_refl
In prior sections: rel 1 relation autom