diffeqs super easy: each diffeq is like a set of directions: e.g. walk straight for 500m, turn left, walk straight 200m, turn right. if you specify a starting

diffeqs super easy: each diffeq is like a set of directions: e.g. walk straight for 500m, turn left, walk straight 200m, turn right. if you specify a starting point or ending point (boundary/initial conditions) then the directions become a specific set of instructions to get you from let's say, the bus stop to the library (particular solution). otherwise it's just a set of directions that can be used to describe getting from a set of places to a corresponding set of other places (general solution).