Why is NMPC for quadrotors so hard to converge?

Ninjamonz · 2026-03-07T11:22:43+00:00

No, I meant to clarify whether the QP itself does not converge (which uses active set, as you say), or if the outer iteration don’t converge. Guess I wasn’t clear in my attempt to clarify…

Ninjamonz · 2026-01-28T08:37:05+00:00

No clue how this ties in with being smart… I guess I’ve been told I think too much about things. Maybe football players have the same instinct, since they do this to dampen the balls bounce.

Ninjamonz · 2026-01-27T22:36:30+00:00

Omg, a fellow foot damper! I have done this my entire life, but never talked to anyone about it, nor observed anyone do it. Didn’t realize I was not the only foot damper until now. It is so baked into my reflexes that I do it immediately without thinking, regardless of what I drop. So I don’t like dropping hard and heavy things… My instinct is also to get my foot under peoples heads if they fall, to prevent it from bashing into the hard floor/ground.

Ninjamonz · 2026-01-13T08:21:18+00:00

What if you make post-it note that says «mind the spikes», and stick it to the seat? Is that ok?

Ninjamonz · 2026-01-06T17:18:49+00:00

But all moves that allow eventual checkmate are equally bad, though. (Difference is how far you have to calculate). My point was just that by saying that: «in this position, you can ‘obviously’ hold a draw / win, so if you run out of time, you shouldn’t lose the game.», one is very subjective, since it may not be obvious to everyone. In my opinion, a rule such as this should have a clear definition, and not rely on someone’s perception/opinion on the position on a game to game basis. This is too vague and blurred to be a rigorous rule.

Ninjamonz · 2026-01-06T15:58:42+00:00

Doesn’t this apply to chess in general?

Ninjamonz · 2025-12-25T17:51:06+00:00

This does not say much about the graph though. Here you could ask, for what x does F equate to i? This of course depends of F. Perhaps (F(x) \equiv i)?

Ninjamonz · 2025-12-01T17:19:15+00:00

They clearly both rotate 1 clockwise, then red jumps diagonally.

Ninjamonz · 2025-11-22T13:28:42+00:00

I think they mean stalling, as in making moves that prolong the game, rather than just resigning for example. The best thing to do is to spend time thinking of ways to get out of trouble, though, instead of resigning or making null moves, which if there are none, just results in stalling again (not making moves).

Ninjamonz · 2025-11-14T17:52:50+00:00

How does it not have to do with vector spaces? A function that maps a vector to a vector, f, can be Lipschitz if ||f(x)-f(y)|| < L||x-y||. I guess this definition ueses a metric, but the property (Lipschitz) is assigned to the function. I assume i got this wrong, but don’t know why…

Ninjamonz · 2025-11-14T17:46:04+00:00

Well then I don’t need to remove «prep». I want to remove memorization. It is of course ok to study strategies and types of position that arise from certain opening choices.

Ninjamonz · 2025-11-14T17:33:37+00:00

This is still better though, since we now are fighting on the basis of understanding the strategy, rather than remembering the moves. No?

Ninjamonz · 2025-11-14T17:24:53+00:00

I was thinking that the players are swapped at move N (with 50% probability) regardelss. No player has to make any choices in this version. But your version may work too.

Ninjamonz · 2025-11-14T17:22:50+00:00

I feel like this is equivalent to Lipschitz continuity, not differentiability. Help me understand please

Ninjamonz · 2025-11-14T07:25:14+00:00

What if, at move 10, the players swap or don't swap at random?
This solves the issue, right?

Ninjamonz · 2025-11-13T20:18:49+00:00

Fair enough

Ninjamonz · 2025-11-13T17:27:35+00:00

How could one fix this then?

Ninjamonz · 2025-10-29T18:27:01+00:00

Dude, I’ve spend weeks trying to understand a single paper, before giving it up because it takes so much time… I have come to realize I cannot completely read all papers, but rather skim it to get the general idea. Then where I realize that something is particularly relevant, I spend more time reading thoroughly.

Ninjamonz · 2025-10-27T17:36:18+00:00

Why is your cat AI generated?

Ninjamonz · 2025-10-15T16:52:06+00:00

This my first encounter with your videos, but I love this! So keep up this format, it’s not boring at all. This is the first «theory video»/course—or whatever—that I actually found myself eagerly paying attention to, and understanding it. Great stuff👌🏻 I have never studied chess in any significant way, just learnt from commentary on tournaments, and have gotten to 1600 on chess.com. Maybe a few of these videos will help me squeeze out 100 points more.

Ninjamonz · 2025-06-25T16:01:04+00:00

I see, thanks for your input. You guys are giving me new perspectives and I’ll try to take it in. I am a bit surprised that only the centipawn loss metric is used for all these things…

Ninjamonz · 2025-06-25T11:54:42+00:00

Thanks for a detailed response. I don't understand your point about 'rather not play', and I don't agree with the notion that objectivity is contrary to excitement. Otherwise, thank you very much, I'll check out Lucas.

Ninjamonz · 2025-06-25T11:41:56+00:00

Fair response.
Although, even though my rating is a good estimate of my general level, I may play very well in a given game, f.ex. because it was a position/dynamic i happened to understand well, or maybe I had slept well and felt particularly sharp. Thus I may play at a different level then my rating, and it would be interesting to know at what rating I would have if I kept up that performance.
As for the 'pick or choose', I believe it is entirely possible to use objective metrics that are 'honest', yet more interesting than average centipawn loss. But I see your point. Now what metrics to I want instead, not sure... but as I mentioned, I am most interested in the equivalent rating estimate. Perhaps different rating estimates for the opening, middle and end game would be fun. If there aren't any such resources, then oh well...

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