# NOT RUN {
dbgumbel(x = 0, mu = -2, sigma = 1, delta = -1)
curve(dbgumbel(x, mu = -2, sigma = 1, delta = -1), xlim = c(-5, 10), ylim= c(0, .4))
integrate(dbgumbel, mu = -2, sigma = 1, delta = -1, lower = -5, upper = 0)
# }
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