wave equation
preferred label: معادله موج @fa
type: Concept
related: leap frog method

implicit method
preferred label: روش ضمنی @fa
type: Concept
narrower: leap frog method

leap frog method
alternative label: cTcS method
related: wave equation
broader: implicit method
preferred label: روش لیپ فراگ @fa
type: Concept