I'd have expected that the convex-concave and concave-convex solutions would be unstable, and that they'd average out to flat-flat.
If I understand you, you're saying that you get symmetry breaking instead, so that once it starts with either concave-convex or convex-concave, it continues going down that route.
Is that right? Is there a way to predict whether you get convex or concave on top, or do you just look at it after a while and say, "Huh, today I got one of these. Guess that's what I'll be looking at for the next N weeks of this project".
If I understand you, you're saying that you get symmetry breaking instead, so that once it starts with either concave-convex or convex-concave, it continues going down that route.
Is that right? Is there a way to predict whether you get convex or concave on top, or do you just look at it after a while and say, "Huh, today I got one of these. Guess that's what I'll be looking at for the next N weeks of this project".