Fourier transform in Klein-Gordon equation
107070
Fourier transform standard practice for physics
51392
What does it mean to Fourier transform a ladder operator (in the input-output formalism)?
123799
Calculating the Fourier transform of $f(t)=Ae^{-i\omega_0 t}$
135967
What is the odd Fourier extension of $\sin x \cos(2x)$?
116427
$(c^{\mu}\partial_{\mu}-m)\phi(x)=0$ not Lorentz-invariant?
116314
On-shell and off-shell transformations in Noether's theorem
124703
Where does the $i$ come from in the Schrödinger equation?
37546
Fourier Series for $|\cos(x)|$
13671
Fourier Transform of Various Tempered Distributions
28221
Numerical Fourier transform of a complicated function
36152
Bessel function representation of spacelike KG propagator
122166
Significance of $i$ in the Schrödinger equation
115012
Klein-Gordon inner product
49060
What is the difference in the uses of $\omega t$ and $kx$ in wave equation?
137349
Solving Wave Equation with Initial Values
29130
Abstract Wave with Particle System
72169
Galilean invariance of the Schrodinger equation