#### Property information

**definition**

x starts with y if and only if x has part y and the time point at which x starts is equivalent to the time point at which y starts. Formally: α(y) = α(x) ∧ ω(y) < ω(x), where α is a function that maps a process to a start point, and ω is a function that maps a process to an end point.

**example of usage**

Every insulin receptor signaling pathway starts with the binding of a ligand to the insulin receptor