Please Help!!

I am struggling with this since hours!

How is it possible then, that for example if c = 0.1, a = 1.0 / (0.1 * sqrt(2.0 * PI)) = 3.9894228.the gaussian function is

This integral is 1 if and only if .

I mean how can the integral be one, if g(0) is larger than one??

Any ideas what my mistake is here?

Thanks a lot!!!