… When f1 , …, fn are defined on an open set G in n +1-dimensional space with coordinates ( t , x1 , …, xn ), and are continuous there , there always exists a solution x1 = x1 ( t ) , x2 = x2 ( t ), …, xn = xn ( t ) that satisfies ( 2 ) for any ( t0 , x10 , …, xn0 ) ∈G. Furthermore, there is only one such solution if f1 , …, fn satisfy the local Lipschitz condition in G , i.e., if K is any bounded closed set in G , then there exists a constant LK > 0 such that ( t , x1 , …, xn )∈K, ( t , x1 ′ , …, xn ′ ) ∈K . The solution is defined in an open interval (α, ω), but its domain generally depends on the initial conditions. … *Some of the terminology explanations that mention the "local Lipschitz condition" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… f1,……,fnが(t,x1,……,xn)を座標とするn+1次元空間内の開集合Gにおいて定義され,そこで連続なときには,任意の(t0,x10,……,xn0)∈Gに対し(2)を満たす解x1=x1(t),x2=x2(t),……,xn=xn(t)はつねに存在する。さらにf1,……,fnがGにおいて局所リプシッツ条件,すなわち〈KをG内の任意の有界閉集合とするとき,定数LK>0が存在して(t,x1,……,xn)∈K,(t,x1′,……,xn′)∈Kならば,が成り立つならばそのような解はただ一つに限る。解は開区間(α,ω)で定義されるが,その定義域は一般に初期条件に依存する。… ※「局所リプシッツ条件」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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