!"#$ ! » →» % " » $ { } % &' () * * "# " #= − #+ % " − #+ % " "# → "# − + → + + = ! ! " "= "= "= ( "& " "& " * + + + → − * + + − − = "# + , − : ≥ ≤ − % } "# ≤1 → * * * ) ,)4* + = % + -{ } ≥ % =− − =− − # $ % "# % " #+ % " #+ % " # = " #+ " #+ " # &'$ "" # − " ## + " " # − " ## " # " " # − " ## + " " # − " ## " # "< & " # " " # − " ## < " # # " " # − " ## < "!# # "!# &' " − #" " # − " ## < ) "≥ , &$ = » ${ = - / " # ∈ % "# ≠ "-# = = − = − #≥ "# − +,) " # = = % - ; " #= = >< D !? ! C !/ # < # " #+ #=" " # # + / E ( " # + " # ∀ ∈ » # ! > ∀ ≠ # % C !/ 4* * * + »( ! ,)4* " # " # /* * @ , " # ( "E# ( " # ,)4* " + # = " # + " # − " + # ∀ ∈ » / ϕ " + # = ϕ " # + ϕ " # ∀ ∈ » '$ ϕ " # = " # − " + # " # F 2/ G * / () 4* ' ";# * ! ϕ "-# : *-% H / ,1 ! * " #* + /* * " #= " #= " #= " # + + + " # + A % A * / /% ; ( * * *