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!!= !∗!=∋2!(∗
!=!> !!(∗
= & !=! =∋2 ! (∗
= ! !? ≅ =2 ! ! !=
! 2%
∋<Α≅%∗
≅!Β∗
≅2!!=−! Χ
! 3!∗
!(∗!!?≅
!!=
0? (
! != !? ! ∆
− ∗Α
!2
0 ? ! ∗ (
∋!−!!
0?%!!!=−
!∋2!!
0 ! 2 ∆ ∋ ∆
%2!=∃6%≅ ! (
Ε!%2Ε % ∆ ! ! %−−2
2