(DON"T WORRY I WILL TRANSLATE INTO ENGLISH LATER but the gist is that EVERYTHING NONLINEAR IN LIFE IS A SERIES OF STAIRS of UNEVEN SIZE). Think of a one-step staircase. On one side you can only rise, on the other you can only fall. Of course there are combinations (various steps differing in size).The Heaviside Function (integral of the Dirac Delta Function) [H[x] =1 if x> x0, 0 otherwise] can be used as the Atomic block for ALL situations of robustness, fragility, & antifragility. NONLINEAR situations can be presented as series of weighted H[x], or integrals of series of H[x] (hint: this is European DIGITAL option, so it can be integrated …).I used this to PROVE that fragility = concavity, negative optionality; antifragility = convexity, positive optionality.