pelda, c1 fuggveny (egyszer biztos folytonosan diffhato):
x <= 0.01 : 0.01*exp(100*(x-0.01))
0.01 <= x <= 0.99 : x
0.99 <= x : 1-0.01*exp(100*(0.99-x))
altalanosabban: ha w=0.01, akkor:
x <= w : w*exp(x/w-1)
w <= x <= 1-w : x
1-w <= x : 1-w*exp(1/w-1-x/w)