A type of partial differential equation. The basic form of a hyperbolic equation is written as ∂ 2 u /∂ t 2 = c 2 ⊿ u …(1) (⊿=∂ 2 /∂ x 1 2 +……+∂ 2 /∂ x n 2 ). Here, c is a positive constant. In physics, it is an equation that describes vibrations and waves, and the unknown function u = u ( t , x ) represents the displacement of the point x = ( x 1 , …, x n ) at time t . Usually, the problem is to find a solution to equation (1) that satisfies the initial condition. This is called an initial value problem for a hyperbolic partial differential equation. Source: Heibonsha World Encyclopedia, 2nd Edition Information |
偏微分方程式の一つ。双曲型方程式の基本的な形は, ∂2u/∂t2=c2⊿u ……(1) (⊿=∂2/∂x12+……+∂2/∂xn2) と書かれる。ここでcは正の定数である。物理的には振動や波動を記述する方程式であって,未知関数u=u(t,x)は点x=(x1,……,xn)の時刻tにおける変位を表す。通常,方程式(1)の解で初期条件,を満たすものを求めることが問題になる。これを双曲型偏微分方程式の初期値問題という。
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