version imprimable

~
~
=~·~=|~|| ~|
\
(~,~)
≡[ ]
C
=ZC
~·~=Z~·~

I
I
I
=~·~=~·~
≡[−]

=Z~·~=Z~·~
=Z~·~=Z(~·~)
= ( −)≡ −
=

=− ≡ ∆
I
I=
I≥
I
I
=ω ω