Hi, I have a gaussian of the form [tex]exp[-\frac{\pi*x^{2}}{A^2}][/tex]. I know that the FWHM=0.939A, but I cannot prove it. I Let [tex]exp[-\frac{\pi*x^{2}}{A^2}=0.5[/tex] (i.e. the half maximum part) taking natural logs I get rid of the exponential, but then which bit represents the full width?