Time-dependent variable
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A Time-dependent variable is a variable that is a function of time, i.e which values depend on the time .
- AKA: Time-dependent function.
- Context:
- It can be expressed as [math]\displaystyle{ y=f(t) }[/math] (univariate case) or [math]\displaystyle{ y=f(x,t) }[/math] (multivariate case)
- Example(s):
- [math]\displaystyle{ H=H_0+V(t) }[/math], the Hamiltonian of a perturbed system.
- [math]\displaystyle{ x(t)=A\;cos(\omega\;t-\delta) }[/math], the general solution of Simple Harmonic Oscillator.
- Counter-Example(s):
- See: Temporal Dimension, Time-dependent Perturbation Theory,