mitmatt

7 ms·

1.
by mitmatt 5y ago
The first statement may be referring to the Cramer-Rao bound: https://en.wikipedia.org/wiki/Cram%C3%A9r%E2%80%93Rao_bound But it only applies to estimation (like how well a population parameter can be estimated) in cer
2.
by mitmatt 13y ago
Corporations are taxed in the US: https://en.wikipedia.org/wiki/Corporate_tax_in_the_United_St...
3.
by mitmatt 13y ago
Just speaking in terms of "quantum size" (and not computing power, which is not understood yet), it depends on the graph of possible entanglements among the qubits. If it were a complete graph (allowing arbitrary entanglement) the
4.
by mitmatt 13y ago
It wasn't really shown to be faster; see http://www.scottaaronson.com/blog/?p=1400 . To focus on the "3600 times" issue, I suggest searching for the strings " Ising" and "CPLEX". Don&#
5.
by mitmatt 13y ago
It's not able to do full quantum annealing; it's only able to use stoquastic Hamiltonians on a fixed topology. Even if truly quantum effects were present (which is unclear at the moment, see Smolin and Smith arxiv posts), it'
6.
by mitmatt 13y ago
To clarify, there are public-key cryptosystems with no known quantum attacks, but it's not known how to build such systems based on problems that are known to be QMA-complete (or NP-complete). Here's a discussion from Scott Aaro
7.
by mitmatt 13y ago
Try piping into psub, as in paste (hquery -q '//a/@href' x | psub) (hquery -q '//a' x | psub) http://ridiculousfish.com/shell/user_doc/html/commands.html#.
8.
by mitmatt 13y ago
What have I said that suggests "MIT is not to blame for very much at all"? My comments have dealt with factual issues; I don't see where I advanced any opinions on MIT's deserved level of blame. The MIT report lays out f
9.
by mitmatt 13y ago
If by "objected to FOIA requests" you mean "filed a motion, just like JSTOR, proposing the ability review and suggest redactions to the requested documents over a window of five days for the explicit purpose of ensuring the p
10.
by mitmatt 13y ago
From http://swartz-report.mit.edu/docs/report-to-the-president.pd... , Appendix 14, Question 35: > 35. What influence, if any, did MIT exercise or could it have exercised in the plea negotiations? Did MIT really scut
11.
by mitmatt 13y ago
> The report appears to find that MIT should not have changed its neutral stance, which is disappointing, and I'm skeptical. The report does not have any findings about what MIT "should" have done, as it states many times,
12.
by mitmatt 13y ago
The USC group has a response to Smolin and Smith which explains how some quantitative features are still best explained by a simulated quantum annealer: http://arxiv.org/abs/1305.5837 . So there's still some potent
13.
by mitmatt 13y ago
That computation is probably something you were already familiar with in disguise: it's just the law of cosines [1][2] along with the fact that a matrix of inner products can be computed with a matrix-matrix multiplication [3]. The fir
14.
by mitmatt 14y ago
I just ran Wes's benchmarks (not the BLAS call versions) on my machine with a Julia I built on 10/13 (17c3c13), and the timings have indeed improved. For the details, see this gist: https://gist.github.com/3901139 (including the comment I
15.
by mitmatt 15y ago
They actually point out a specific comparison to FFTW in the paper: their "preliminary implementation" is faster than FFTW for n=2^22 and k<=2^17, and they point out that this performance is a distinct advantage over previous algorithms
16.
by mitmatt 15y ago
Lee Smolin argues pretty concretely and convincingly that the anthropic principle cannot be science because it cannot yield falsifiable predictions: http://arxiv.org/abs/hep-th/0407213 On a side note, his book "The Trouble with Physics" i
17.
by mitmatt 15y ago
It was debunked by some of the top minds in the world (e.g. Terry Tao), though the author's webpage states that it's under journal review. Here's the "official" debunking summary on PolyMath: http://michaelnielsen.org/polymath1/index.php?t
18.
by mitmatt 16y ago
For the record, the iPad is $499/$599 for 16/32 GB (WiFi) models, not $599/$699 as you stated: www.apple.com/ipad http://store.apple.com/us/browse/home/shop_ipad/family/ipad?...
19.
by mitmatt 16y ago
Those are a lot of great links! But I disagree with your "BTW" line: I don't think factor graphs are more popular than Bayes nets (a.k.a. directed graphical models), at least not in general machine learning (though perhaps in some particula
20.
by mitmatt 16y ago
Just so you know, the Latent Dirichlet Allocation is very much a Bayesian model, as it says in the original paper's abstract [1] (first google hit). (LDA is a bit of an overloaded acronym in machine learning, but I'm assuming that's what yo