Методы математической физики - 124 стр.

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v +
2
γ 1
c = const ,
v
2
γ 1
c = const .
v(x, t) c(x, t)
r = v +
2
γ 1
c , s = v
2
γ 1
c .
r/∂τ
1
= 0 s/∂τ
2
= 0
v ± c r s v = (r + s)/2, c = (γ 1)(r s)/4
v + c =
µ
1
2
+
γ 1
4
r +
µ
1
2
γ 1
4
s ,
v c =
µ
1
2
γ 1
4
r +
µ
1
2
+
γ 1
4
s ,
½
r
t
+ (α r + β s) r
x
= 0 ,
s
t
+ (α s + β r) s
x
= 0 ,
α =
1
2
+
γ 1
4
, β =
1
2
γ 1
4
.
r(x, t), s(x, t) ϕ
1,2
(x)
s(x, t) s(x, t) =
u
0
r(x, t) t
c
v = (r + s)/2
v = (r u
0
)/2
r
r
t = t
c
r/∂x