, , , p2 p1, (.16.1). , 㳿, , , ( ).
- , , , , , , , . : , , ,
.16.1 . , - , .
Գ () 㳿 , .
p1 - p2 , . (13.17)
h1 h2 = 1/2 . ()
h1, h2 ﳿ I-I II-II.
, c2 c1 . , , , h1 = h2.
, , pI , . , 㳿 p1. , 㳿 - , (). , , ' ﳿ, , . , , , .
. , h1 = h2 , , 1 = 2, .
h2 h1 = . (2 T1)
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T, S (.16.2) 1 2, , 1 = 2. , 1-2 , 1 2 , , . 1-2 .16.2 . ij, -
.16.2 (13.17) ﳿ, , . ϳ , 㳿 , , , , . , 1 2 h t, h = const .
Գ :
h1 = h2
u1 + p1 . v1 = u2 + p2 . v2, (16.1)
u1 u2 = p2 . v2 p1 . v1 , (16.2)
, 㳿 . : ( ) ( ').
(), p2 . v2 p1 . v1, 㳿 .
, 㳿 㳿 (16.40) :
1. p2 . v2 p1 . v1 㳿, 㳿 , 2 < 1.
2. p2 . v2 p1 . v1 㳿, 㳿, 2 > 1.
3. p2 . v2 p1 . v1 㳿, 㳿 , , , 2 = 1.
, (2 = 1), , , , .
, (h1 = h2), ' , , , .