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Jan 22, 2019 at 12:56 history edited DreamConspiracy CC BY-SA 4.0
fixed terminology
Jan 22, 2019 at 12:55 comment added DreamConspiracy @FedericoPoloni ah yes. I will edit the answer to fix the terminology
Jan 22, 2019 at 12:52 comment added Federico Poloni Probably it's just a matter of different definitions, but I would call a pencil balancing on its tip an unstable equilibrium point. I guess that when you write "stable" you mean what I call "equilibrium point", not what I call "stable".
Jan 21, 2019 at 6:48 comment added DreamConspiracy @alecrhea a global minimum is essentially always stable in a system that is governed by physical laws where the gradient of potential is proportional to acceleration. That doesn't mean there are no other stable points or that these are never reached
Jan 21, 2019 at 6:45 comment added Alec Rhea Welcome to MO dreamconspiracy. An egg yolk balanced on top of a bowl instead of inside is perhaps a closer example of unstable equilibrium, but the configuration they've found above is stable and (essentially) the global minimum PE.
Jan 21, 2019 at 6:35 review First posts
Jan 21, 2019 at 7:21
Jan 21, 2019 at 6:33 history answered DreamConspiracy CC BY-SA 4.0