The existence theorem shows that the equation has at least one solution provi ded the nonlinear term satisfies a linear growth condition.

 
  • 這個(gè)存在定理說(shuō)明只要非線(xiàn)性項滿(mǎn)足某種線(xiàn)性增長(cháng)條件該方程至少有一個(gè)解 .
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