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ihm commented on WTF Happened in 1971? (2019)   wtfhappenedin1971.com/... · Posted by u/lr0
ihm · 8 months ago
In summary: the capitalist class won the class war.
ihm commented on Car tires shed a quarter of all microplastics in the environment   phys.org/news/2024-11-car... · Posted by u/geox
Aurornis · 9 months ago
Manufacturers aren’t making tires and then turning them into microplastics alone. Pretending consumers aren’t part of the problem is misleading.

We could add fees to tire manufacturers, but be honest: It will just get added to the price of the tire. That’s fine if the goal is economic incentives or funding remediation, but people start to lose interest in such fines as soon as they realize it comes out of their own pockets instead of from some imagined slush fund manufacturers are keeping to themselves. (See similar problems with conversations about tariffs, which people only like until they realize they will be paying for them.)

ihm · 9 months ago
Consumers are not part of the problem. There is literally no action a consumer can take to ameliorate this situation because there are no tires produced that don't have this problem, and many consumers need to have a car to live.
ihm commented on The Use of Knowledge in Society (1945) [pdf]   kysq.org/docs/Hayek_45.pd... · Posted by u/kreyenborgi
Geee · 10 months ago
Hayek doesn't talk about price stability or inflation at all in this article. There's no fallacy here.

This is basically the "prices are all we need" of economics. It's written in historical context when some still economists thought that a centrally planned economy could work. Hayek writes about the price system and how it enables an economy to function in a decentralized manner, and why it can't function without it. Hayek argues that it's essential that the decisions are made with local knowledge, because every individual possesses private and unique knowledge, which is not available to central planners.

On the other hand, all the information which an individual needs from other individuals is transmitted through prices, i.e. everyone only needs to know how to make best use of the prices they see. Thus, there's no need for any kind of oracle or central entity which knows what's going on in the economy to make it function.

This is still relevant of course, in the way that most people don't realize how magical the price system is, and how humans basically just stumbled upon it without anyone understanding it.

ihm · 10 months ago
It’s not remotely true that prices are capable of transmitting all the information required to reproduce society.

This is for the simple reason that prices more or less only communicate information about the amount of labor required to produce a thing[0].

Therefore prices on their own are, for example, incapable of transmitting information about what action needs to be taken to correct the relationship to the biosphere. Information about the state of the biosphere will only enter into prices to the extent that things start taking more labor to produce. But there’s no market mechanism that would then cause that to direct action towards stabilizing the climate.

[0]: This is because cost resolves into business owner’s cut + labor cost + cost of inputs, and the inputs can recursively be split into the same until you’re left with the amount owners take, the amount paid to workers, and the amount paid to owners of natural resources.

The business owner’s cut and the amount paid to owners of natural resources are socially determined and bear almost no relationship to the physical world or reproduction of society.

Deleted Comment

ihm commented on Group actions and hashing unordered multisets (2021)   jeremykun.com/2021/10/14/... · Posted by u/KqAmJQ7
ihm · a year ago
I think there are a few errors here. First there is afaict no reason the image of phi has to break up into power-of-two cyclic groups.

Second and more importantly, it seems very difficult to start with the decomposition into cyclic groups and then choose a map from the multiset group into the permutation group that corresponds to the given decomposition in a good way.

Relatedly, the isomorphism between the image of phi (i.e., the action of accumulating hashes) and the decomposition into cyclic groups may be difficult to compute, which can make finding collisions infeasible for an attacker when they could do it easily if given the explicit representation.

So overall the conclusion that “you might as well make this forced structure explicit, and just pick the block structure you want to use in advance” seems incorrect.

The blog post someone linked on multiset hashing with elliptic curves proves the foregoing points. The cyclic groups do not have power-of-two orders and the group action is very complicated even though the description in terms of elliptic curve addition is quite simple.

ihm commented on A quick post on Chen's algorithm   blog.cryptographyengineer... · Posted by u/feross
keepamovin · a year ago
There'll probably be discovered a class of problems which is hard and Q hard, provably and we'll be set. Something basically new to cryptography, that was tried once in the past but failed until seen through a new light of more recent maths or research fashion.

But until then it seems to me like something based on the difficulty of attacking hash functions would be a good bet for Q resistant. Totally unsure how to make a PK scheme from that, but it has a few nice properties:

- hashes are often tuneable, you can add more state and increase the keyspace/security

- good hashes don't have any weaknesses that Q can exploit

- hashes are often pretty fast

- hashes are well studied

- hashes seem to be hard in C and hard in Q

ihm · a year ago
There are a bunch of hash based signature schemes, e.g., SPHINCS https://sphincs.org/
ihm commented on ProofWiki: Online compendium of mathematical proofs   proofwiki.org/wiki/Main_P... · Posted by u/Tomte
md224 · 2 years ago
> However, we also see that for only those combinations starting with a T (that is f(n - 1))...

Why is that f(n - 1)?

ihm · 2 years ago
The set of sequences of length n ending in HH (and with no earlier HH) and beginning with a T are in bijection with the set of sequences of length n-1 ending in HH (and with no earlier HH) by the bijection

   def f(s):
     assert(s[0] == 'T')
     return s[1:]
whose inverse is

  def f_inverse(s):
    return 'T' + s

ihm commented on How would you say “She said goodbye too many times before.” in Latin?   latin.stackexchange.com/a... · Posted by u/micouay
bitdivision · 2 years ago
Yes, I agree, Spanish is generally more verbose.

The weird one is that Latin American Spanish is spoken much slower, but with the same information per syllable (presumably). I always wondered if the information rate would actually be the same for Spanish (LATAM) and Spanish (Spain) - my suspicion is that it's lower in LATAM. Perhaps pauses and connective words could account for the difference though?

ihm · 2 years ago
There's huge variation in Latin American dialects, there's definitely no universal speed of speech.
ihm commented on Replicator Is DoD’s Big Play to Build 1000s of Autonomous Weapons in Just 2 Yrs   thedrive.com/the-war-zone... · Posted by u/remarkEon
ihm · 2 years ago
Horrifying to see open and talk of war with China with no shame whatsoever. Not only is there 0 reason for such a war besides providing a market for these stupid murder gadgets, the human toll of such a war would be unthinkable.

u/ihm

KarmaCake day792August 14, 2012
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