The equation of motion of ##\phi^4## theory is ##(\partial^{2}+m^{2})\phi = -\frac{\lambda}{3!}\phi^{3}##.(adsbygoogle = window.adsbygoogle || []).push({});

Why can't this equation be solved using Fourier analysis? Can't we simply write the equation in Fourier space and take it from there?

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# Solving phi-fourth theory using Fourier analysis

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