Hi there, I'm having trouble convolving two signals, according to this site "http://cnx.org/content/m11541/latest/" [Broken]" and its example, for the time period 0≤t<1 they've used the integral yt=∫dτ between 0≤t<1. My problem is, how did they get this integral?. I get that the height of the two signals is one, hence 1*dτ but I'm still hazy on this. I'm working on a question where the graph looks like this. [PLAIN]http://img705.imageshack.us/img705/6834/myconv.png [Broken] but i don't know how to get the integral at the position?.