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    It’s asking me to create an account.

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      Even after creating an account it says I don’t have permission to view the post

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        Hum. I’ll see what went wrong, and repost (and delete this one) if I can.

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          I think the post has been set to protected since I posted it here. I can’t visit it myself any more, either, though I can still visit its siblings. Apologies to all.

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      I saw it earlier. He just mentioned a few things like pushdown automata and an extension of it. Focus was bounded computation in time and memory. I can’t remember any more past that since I just skimmed it.

      So at least this…

      https://en.m.wikipedia.org/wiki/Pushdown_automaton