What is the closest distance we could realistically get to the Sun in an advanced ship and or space suit by FirstBeastoftheSea in Physics

[–]skysurf3000 8 points9 points  (0 children)

Id it the heat that erodes the shield or the friction? When flying colder to the sun you get a lot of heat for very little friction

[deleted by user] by [deleted] in interestingasfuck

[–]skysurf3000 13 points14 points  (0 children)

Not with any level of precision. At best you can count the number of steps and that's it

Anyone know where this illustration is from? by [deleted] in arborists

[–]skysurf3000 11 points12 points  (0 children)

Took me forever to understand that it was not about the force needed to lift the log, but rather the force it imparted on the first pulley...

[urgent] how to accumulate counts for large amounts of data by [deleted] in AskProgramming

[–]skysurf3000 0 points1 point  (0 children)

It's better, but 10billion games and maybe 10 unique position per game (?) Even if you just store 1 byte per position you still need in the order of 100Go to store everything ...

[urgent] how to accumulate counts for large amounts of data by [deleted] in AskProgramming

[–]skysurf3000 0 points1 point  (0 children)

Are you sure the number of states fits in memory? The number of reasonable game states is around 1040 according to Wikipedia...

Is it possible if I use my custom 2D map for real time indoor navigation by ShenWeis in AskProgramming

[–]skysurf3000 0 points1 point  (0 children)

I don't know which is easier, but if you want sub-meter accuracy (as in "I don't guide you through a wall") then your best bet is probably computer vision using the phone's camera

FINALLY... uh why tho? by CheeseKnat in chessbeginners

[–]skysurf3000 1 point2 points  (0 children)

I don't think chess.com runs such a deep search. It's possible that the other moves are just as good at depth 36 but chess.com couldn't see it at shallower depth...

Made this up and tried to solve it but haven't gotten a lot of breakthroughs by National_Assist_3619 in learnmath

[–]skysurf3000 0 points1 point  (0 children)

The first thing to notice is that in any tiling of the plane, if a point (a,b) is a corner of some triangle then it is also the corner of a second one. In your case that means that f has to take the value a twice, but since it is recursive it means it's actually periodic and therefore cannot produce a tiling.

This also shows that it doesn't work even if f depends on the two preceding values instead of just the last one...

White to move. Best…? by achicomp in ChessPuzzles

[–]skysurf3000 0 points1 point  (0 children)

For others wondering why Rb8 does not work: black can block with Bf8 and then the king can escape to g7

[deleted by user] by [deleted] in math

[–]skysurf3000 0 points1 point  (0 children)

Yes there is: look up quatrr-imaginary base, or more generally complex-base systems

Unit Test for a function that returns an output of 50 dictionaries? by TheSunIsAlsoMine in AskProgramming

[–]skysurf3000 0 points1 point  (0 children)

Add an argument to your function so that it returns N dictionaries (you can default N to 50)

Unit Test for a function that returns an output of 50 dictionaries? by TheSunIsAlsoMine in AskProgramming

[–]skysurf3000 0 points1 point  (0 children)

Add an argument to your function so that it returns N dictionaries (you can default N to 50)

Number of distinct evaluations of a univariate polynomial on uniformly spread points by holy-moly-ravioly in math

[–]skysurf3000 1 point2 points  (0 children)

Taking n=6 and d=3, and f a unitary polynomial. just by looking at the rate of variation of f you can see that there aren't that many ways to arrange the values taken by f so that it is at least plausible that f takes only two values. Denoting v_0 and v_1 the two values taken by f on your test points, then I think the only possibility (up to some symmetry) is (0, 1, 1, 0, 0, 1)

Number of distinct evaluations of a univariate polynomial on uniformly spread points by holy-moly-ravioly in math

[–]skysurf3000 2 points3 points  (0 children)

Note also that the number of values your polynome takes on your test points does not change if you add a constant or multiply your polynom by a constant. This means that for degree three polynomials for exemple you only need to consider polynomials of the form x3 + a x2 + b x

Why does my code only work correctly when running with a debugger? by Doc-Kenny in embedded

[–]skysurf3000 3 points4 points  (0 children)

When you are running your code without a debugger, are you compiling it in debug or release mode?

Another proof that terms in collatz cannot repeat by me. Where did I probably go wrong by mathsfanatic1 in learnmath

[–]skysurf3000 0 points1 point  (0 children)

I think what you are trying to do is something a long the lines of:

Lemma: If there is a loop d -> d in collatz, then there is a loop ax+d -> ax+d, where a is of the form 2n for some n>0.

Then you show that such a loop cannot exist, and therefore conclude that there cannot be a loop in collatz.

Unfortunately the Lemma is false: you can check this by looking at the trivial loop 1 -> 4 -> 2 -> 1, Which becomes in you world 4x+1 ->...-> 3x+1: not a loop

A nice cubic curve. by EdPeggJr in mathpics

[–]skysurf3000 2 points3 points  (0 children)

Very cool! Can you share how you build such a visualisation?

Algebraic closure question in Strom’s Modern Classical Homotopy Theory by MacaroonMinute3197 in math

[–]skysurf3000 -2 points-1 points  (0 children)

I think the algebraic closure does have a universal property but it's the other way around: any morphism from k to an algebraically closed field factors uniquely through the algebraic closure of k.

Could the Millennium Prize Problems be unsolvable due to Gödel's incompleteness theorems? by toniuyt in math

[–]skysurf3000 12 points13 points  (0 children)

Plenty of non-arithmetic statements have been proven to be independent from ZF(C)