Oscillatory solutions of some autonomous partial differential equations with a parameter
A class of partial differential equations of evolution (stemming from the groundwater flow problems) depending on a parameter τ is studied. The existence of an open interval T⁰ of parameter τ and of a function τ → Θ(τ ), Θ: T⁰ → (0, +∞), is proved with the property that any nonzero global solution u...
Збережено в:
| Дата: | 2017 |
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| Автор: | |
| Формат: | Стаття |
| Мова: | English |
| Опубліковано: |
Інститут математики НАН України
2017
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| Назва видання: | Нелінійні коливання |
| Онлайн доступ: | http://dspace.nbuv.gov.ua/handle/123456789/177316 |
| Теги: |
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| Назва журналу: | Digital Library of Periodicals of National Academy of Sciences of Ukraine |
| Цитувати: | Oscillatory solutions of some autonomous partial differential equations with a parameter / L. Herrmann // Нелінійні коливання. — 2017. — Т. 20, № 3. — С. 423-430 — Бібліогр.: 14 назв. — англ. |
Репозитарії
Digital Library of Periodicals of National Academy of Sciences of Ukraine| Резюме: | A class of partial differential equations of evolution (stemming from the groundwater flow problems) depending on a parameter τ is studied. The existence of an open interval T⁰ of parameter τ and of a function τ → Θ(τ ), Θ: T⁰ → (0, +∞), is proved with the property that any nonzero global solution u: R⁺ ×Ω → R of the equation cannot remain nonnegative (nonpositive) throughout the set J ×Ω, where J ⊂ R⁺ is any interval the length of which is greater than Θ(τ ). In other words, such solutions are globally oscillatory and Θ(τ ) is the uniform oscillatory time. The interval T⁰ as well as the function Θ are explicitly determined. |
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