f(x,y) . n , S1 , S2,..., Sn d1,d2,..., dn ( ). Pi(xi, yi) :
.
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:
, n max dk 0, f(x, y) , :
1) ;
2) i
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f(x, y) > 0 , , z = f(x, y), - z, - ( ).
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:
1. = ,
= ( < ), - = j1() =j2()
(j1() £ j2()), , , (. 1).
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. . . .
, , ( ) ( ). .
2.
= , = d ( < d), - = Y1(), = Y2() (Y1 () £ Y1 ()), (. 2).
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, , .
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13
1. ; 2. .
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14
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1. ; 2. .
1. ; .
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2. ; ;
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=
4