In this instance, sometimes the term refers to the differential equations that the system satisfies (e.g., Newton's second law or Euler–Lagrange equations), and sometimes to the solutions to those equations.
Bu durumda, bazen terim sistemi tatmin eden bir differansiyal denkleme işaret edebilir (örneğin, newton'un ikinci yasası veya Euler-Lagrange denklemleri), ve bazen de denklemlerin çözümlerine.