Programming can often help you understand mathematics better, and likewise, and vice versa. And so what you're crating here is simar equation. Sindotc takes two variables, a left hand side and a right hand side. So the left hand is the derivative of i stood saying thatt, the speed at which the number of infected people changes over time. That's actually the name of the proomitor. We've dold up the actual numeric solution for the differential equations. This one actually uses te interesting in the library that i am us fascinated with. It's an old scolasiliritye. I just had the folks on back in may, not too long