Viewing profile — zzazzdsa

I won with 1. e4 e5 2. Qh5 a6 3.Bc4 a5 4. Qxf7#. I wonder if you could implement a stronger engine in regex (stockfish classic at O(1) nodes is plenty strong already)

The momentum analogue for Langevin is known as underdamped Langevin, which if you optimize the discretization scheme hard enough, converges faster than ordinary Langevin. As for yo…

Does this really require stochastic calculus to prove? This should just be a standard integration, based on the fact that the expected number of samples required for fixed A being …

To be fair, CS theory is basically just mathematics :)

2 to the billion is still constant....

Yep, Whink brand rust remover is 4% HF. It's a somewhat useful source of hydrofluoric acid in a pinch. I recall a procedure for making uranium tetrafluoride from uranium trioxide (…

For a specific example of something like this being important, remember the (very impressive) Watch for Rolling Rocks in 0.5 A presses video from a couple years ago? https://www.yo…

We had plenty of evidence that a deterministic primality testing algorithm exists, though. The Miller-Rabin test was known to be randomized polynomial time since the 70s, and assum…

Magnesium will only burn when heated to near its melting point of ~400 C, and thermite can only be set off at temperatures that would melt aluminum. Shipping them together is not a…

From a practical point of view, the only semi-common thermites that can actually explode are copper and silver. However, these thermites do not "detonate" as in the definition. The…

Alternatively, the three components for gunpowder can be bought very cheaply and nigh-untraceably from hardware stores: potassium nitrate is stump remover, sulfur is used to reduce…

Guns aren't a major industrial commodity chemical with hundreds if not thousands of valid non-violent civil uses, however...

Potentially, but the neutralization of sulfuric acid releases a ton of heat (sometimes enough to crack glassware). By neutralizing the sulfuric acid without giving the heat anywher…

Yep, that server is indeed still at Stanford. It is now in the basement of the Huang building in the engineering quad.

Well, pH refers to the concentration of protons in water solvent. Since pure sulfuric acid has no water (excluding that which is in equilibrium with sulfur trioxide), pH isn't real…

Conway showed that the generalized Collatz conjecture (recurrences with arbitrary cases dependent on the modulus) is computationally undecidable (halting problem reduces to it). Th…

Then again, both have something to do with bugs on some level...

The thing with these substances is that although these substances are best known for their psychological effects, they may also have some medically useful effects for somatic disor…

Unless my understanding of things is wrong, I'm pretty sure that unless the strong exponential time hypothesis (essentially, n variable CNF-SAT takes O(2^n) time in the worst case)…

When mixed with sulfuric acid, it forms manganese heptoxide, which does lovely things like ignite paper on contact and detonate if heated above 50 C!

A lot of the posts here seem to be missing something important: permanganate is an EXTREMELY vividly colored ion in solution. The bright colors of the water in the pictures is abou…

For what it's worth, permanganate is an extremely strong oxidizer (probably the second strongest stable solid oxidant known, after persulfate), but at neutral pH it is unable to ox…

A good game to test this on is http://www.chessgames.com/perl/chessgame?gid=1139126 . Tal played the move 19. Rf6!!, which instantly wins the game. However, (at least when I tested…

There's a pretty easy proof to show why compression of truly random data is impossible. Let C be a compression algorithm. Assume that for all bit strings S, C(S) is not longer than…