pontus

12 ms·

91.
by pontus 6y ago
I suspect what was meant was that it's only apparent if you can view the torus from "a bird's eye view". If you were an ant walking on the surface at night, you would never run into a hole in the usual sense. You would b
92.
by pontus 6y ago
That's interesting, thanks for the calculation!
93.
by pontus 6y ago
These energy/CO2 costs existed before crypto. The carbon footprint of something like Bank of America or VISA are not zero, it's just that we are more comfortable accepting these as "productive" because they're way l
94.
by pontus 6y ago
Yes, that's right: you need <V'(x)> rather than V'(<x>). It's still the case that <x> does not follow a linear DE. My point was that while the SE is linear, that does not mean that everything derived fr
95.
by pontus 6y ago
While the Schrodinger equation is linear, that doesn't mean that the time evolution of various derived quantities are also linear. For example, the expectation value of position follows a nonlinear equation of motion even though the sc
96.
by pontus 6y ago
That's still really surprising I think. I would have imagined that it would have been off by many orders of magnitude. The fact that these models are within a factor of 3-10 of the human consumption is pretty impressive. That being sai
97.
by pontus 6y ago
Maybe a nitpick, but there's a difference between energy consumption during training and inference. If you want to talk about the energy necessary to train a human brain, it involves years of that 20W power consumption. What is the pow
98.
by pontus 6y ago
Could you expand on this? I've heard many times that tether is what underlies a lot of the infrastructure of bitcoin trading on exchanges and that the company responsible for backing them is particularly unclear about what's going
99.
by pontus 6y ago
That would be nice, the problem is that nobody has a good way of doing that. Like the analogy I gave elsewhere, it's sort of like a hash function: doable to compute in one direction but seemingly impossible to invert. If that's th
100.
by pontus 6y ago
I love this book so much. It takes a strong Bayesian point of view that makes things so clear to me. It's well written and we'll structured. It starts with a summary chapter of ML which honestly by itself gets you to a very good p
101.
by pontus 6y ago
Ok, when I say mathematically consistent I don't mean it in an axiomatic sense. In fact, like you point out there is a lot of unanswered questions even within quantum field theory whether or not it's mathematically well defined. I
102.
by pontus 6y ago
I agree that it's important to be able to reproduce existing theories. What I don't think is fair is to say that because we have not yet figured out a way to perform this reduction we should throw the theory out. There's a di
103.
by pontus 6y ago
Yes, when I say that AdS/CFT is successful, I definitely am not saying that we have a falsifiable prediction for black holes, but I also don't mean that these are simply results that famous physicists like and promote, it's a
104.
by pontus 6y ago
Sure! So, take as a silly example a regular pendulum of mass m and length l swinging on earth where the acceleration due to gravity is g. Suppose we want to figure out what the period of the pendulum is (i.e. how long it takes for it to mak
105.
by pontus 6y ago
Disclaimer: My background is in string theory. I've spent a lot of time thinking about this subject (in fact, I studied string theory at Columbia which is where Peter Woit is). The main issue that people have with string theory is the
106.
by pontus 6y ago
Thanks! This will definitely take a while to parse :) Appreciate the link!
107.
by pontus 6y ago
Thanks for the suggestion! I have read the original paper, but am looking for more math. Things like what the structure of sha256 is, why we double hash, various probability calculations of hash collisions, statistical investigations into t
108.
Ask HN: Resources for Cryptography and Cryptocurrencies
8 points by pontus 6y ago|4 comments
109.
by pontus 6y ago
Assuming you could still have limit orders cross the spread maybe?
110.
by pontus 6y ago
The title reminded me of snarxiv, a generator of fake high energy physics article titles: http://snarxiv.org/
111.
by pontus 6y ago
The fact that some think there's a distinction between a startup and a sustainable business says a lot about SV. A startup should be sustainable too. There's a distinction between a quickly growing business or a slowly growing bus
112.
by pontus 6y ago
Thanks for the book suggestion, just bought a copy. Looks really great!
113.
by pontus 6y ago
I talked about this elsewhere in this thread (just with gloves instead of colored balls).
114.
by pontus 6y ago
There is a fairly recent development in theoretical physics called ER=EPR that attempts to clarify entanglement by conjecturing that two entangled particles are equivalent to two particles that have a worm-hole connecting them. To me, this
115.
by pontus 6y ago
You've hit the nail on the head. This is what's called the measurement problem in quantum mechanics and it's arguably the biggest open question in foundational quantum theory. Nobody knows what a measurement actually is nor d
116.
by pontus 6y ago
It sounds like there's some stuff in your analogy that is similar to the QM situation. I would caution against placing too much emphases on these analogies though since a very important aspect of all of this is not just that the two sy
117.
by pontus 6y ago
The receiver does not know that a message has been sent until the first person contacts them classically. It's a common mistake to think that quantum teleportation is a new way of sending information. It's really a way to use clas
118.
by pontus 6y ago
There are limits to how much three systems can be entangled with each other. It turns out that one system cannot be maximally entangled with two different systems. In fact, these types of arguments are often used in studying information par
119.
by pontus 6y ago
Yes, it's a direct result from the linearity of time evolution in QM. Like you say, if state1 x raw_material -> state1 x state1 (i.e. we are able to take some raw material and clone state1) and also state2 x raw_material -> state
120.
by pontus 6y ago
Yes, that's correct

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