const In : set set prop term iIn = In infix iIn 2000 2000 term Subq = \x:set.\y:set.!z:set.z iIn x -> z iIn y term TransSet = \x:set.!y:set.y iIn x -> Subq y x const Pi : set (set set) set term setexp = \x:set.\y:set.Pi y \z:set.x const SNo : set prop const SNoLt : set set prop term < = SNoLt infix < 2020 2020 term SNoCutP = \x:set.\y:set.(!z:set.z iIn x -> SNo z) & (!z:set.z iIn y -> SNo z) & !z:set.z iIn x -> !w:set.w iIn y -> z < w term nIn = \x:set.\y:set.~ x iIn y const real : set const omega : set const SNoLe : set set prop term <= = SNoLe infix <= 2020 2020 const ap : set set set const Sep : set (set prop) set const SNoS_ : set set const SNoCut : set set set const SNoLev : set set const SNoEq_ : set set set prop lemma !x:set.!y:set.x iIn setexp real omega -> y iIn setexp real omega -> ~ (?z:set.z iIn real & !w:set.w iIn omega -> ap x w <= z & z <= ap y w) -> (!z:set.z iIn omega -> SNo (ap x z)) -> (!z:set.z iIn omega -> SNo (ap y z)) -> Subq (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (SNoS_ omega) -> Subq (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z) (SNoS_ omega) -> SNoCutP (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z) -> SNo (SNoCut (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z)) -> (!z:set.SNo z -> (!w:set.w iIn Sep (SNoS_ omega) (\u:set.?v:set.v iIn omega & u < ap x v) -> w < z) -> (!w:set.w iIn Sep (SNoS_ omega) (\u:set.?v:set.v iIn omega & ap y v < u) -> z < w) -> Subq (SNoLev (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w))) (SNoLev z) & SNoEq_ (SNoLev (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w))) (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w)) z) -> (!z:set.z iIn omega -> ap x z <= SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w)) -> (!z:set.z iIn omega -> SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) <= ap y z) -> ~ !z:set.z iIn omega -> ap x z <= SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) & SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) <= ap y z var x:set var y:set hyp x iIn setexp real omega hyp y iIn setexp real omega hyp ~ ?z:set.z iIn real & !w:set.w iIn omega -> ap x w <= z & z <= ap y w hyp !z:set.z iIn omega -> SNo (ap x z) hyp !z:set.z iIn omega -> SNo (ap y z) hyp !z:set.z iIn omega -> !w:set.w iIn omega -> ap x z <= ap y w hyp Subq (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (SNoS_ omega) hyp Subq (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z) (SNoS_ omega) hyp SNoCutP (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z) hyp SNo (SNoCut (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & z < ap x w) (Sep (SNoS_ omega) \z:set.?w:set.w iIn omega & ap y w < z)) hyp !z:set.z iIn Sep (SNoS_ omega) (\w:set.?u:set.u iIn omega & ap y u < w) -> SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) < z hyp !z:set.SNo z -> (!w:set.w iIn Sep (SNoS_ omega) (\u:set.?v:set.v iIn omega & u < ap x v) -> w < z) -> (!w:set.w iIn Sep (SNoS_ omega) (\u:set.?v:set.v iIn omega & ap y v < u) -> z < w) -> Subq (SNoLev (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w))) (SNoLev z) & SNoEq_ (SNoLev (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w))) (SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w)) z hyp !z:set.z iIn omega -> ap x z <= SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) claim ~ !z:set.z iIn omega -> SNoCut (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & w < ap x u) (Sep (SNoS_ omega) \w:set.?u:set.u iIn omega & ap y u < w) <= ap y z