English Van der Pol oscillator Cited by user Cosmia Nebula on 10 May 2023 [[File:Van der Pol oscillator phase plot 01.webm|thumb|van der Pol oscillator phase plot, with |border colour=#0073CF|background colour=#F5FFFA}}where x is the position…
English Poincaré–Lindstedt method Cited by user Cosmia Nebula on 10 May 2023 In perturbation theory, the Poincaré–Lindstedt method or Lindstedt–Poincaré method is a technique for uniformly approximating periodic solutions to ordinary differential…
Spanish Función definida positiva Cited by user Wiki LIC on 12 Oct 2022 En matemáticas, una función definida positiva es, según el contexto, cualquiera de los dos tipos de function.
Chinese 正定函數 Cited by user Wolfch on 18 Mar 2009 在數學上,正定函數一詞可以用來表達許多不同的概念。 ==在動力系統中== 一個實值、連續可微的函數f在原點附近的區域D為正定函數的條件是 *