"He was saying a real startup trajectory might look something more like this" (emphasis mine)
When we're graphing trajectories, not functions, loops are certainly allowed (see e.g. phase diagrams[1]). Still, without labeled axis those graphs are pretty much meaningless, so I treat them more like an conceptual illustration.
"He was saying a real startup trajectory might look something more like this" (emphasis mine)
When we're graphing trajectories, not functions, loops are certainly allowed (see e.g. phase diagrams[1]). Still, without labeled axis those graphs are pretty much meaningless, so I treat them more like an conceptual illustration.
[1] - http://en.wikipedia.org/wiki/Phase_space