36) , .
, . . , , , ; , .
. , , , .
, AD , AS .
37) AS .
AS :
- ;
- ;
- .
AS . , AS , , .. AS.
, AS AD. AD (. 2.2) .
AS
AS , . AD , , .
AS , , , .
AS , . .
AS.
I ; II ; III .
38) . , . , , , .
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, .
:
: ΔC ; Δ ; MpC .
:
ΔS ; Δ ; MPS .
-
:
I. .12 Yp , , : (0 S0), (0 I0) (. (S,I)0 . 12), .
:
II. , , ( ) , Y1 , : Y1 > Yp, (0 S1) > (0 I1).
, , () , (Y = Y1 - Yp). , , , , . , , , , , . , ( Y = Yp, S = I = (0 SI0).
III II-: Y2 < Yp, (0 S2) < (0 J2)
, , , , . , , ( ) , . ( ).
39) - , , , .
:
1. , .
2. () , - .
3. , .
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4. , , .
5. ( ) .
, , ; . . ( ), 1 ( , , ), 2 ( , , ), 3 ( , , ), L ( , , , ).
40) , - . , - . , . .
. , . , , . .
, .
41) . , , . . , , .
(-) , - . , : , .
42) , , () .
, , , , , . , , . ,
. . ,
.
, - (Y). (t), , , (q): . ,
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, :