kxyvr

37 ms·

211.
by kxyvr 8y ago
I don't doubt that Kazcynski was highly intelligent, but I would be careful of throwing out IQ scores like that. It very much depends on the test. More to the point, I believe that both Wechsler and Stanford-Binet have a maximum scor
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by kxyvr 9y ago
I'll disagree with this. Cybenko's approximation for a multilayer perceptron is simply a concrete expression for Kolmogorov's representation of a continuous function, which was created in order to solve Hilbert's Thirte
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by kxyvr 9y ago
Oh I very much agree that good MIP solvers work well for complementary problems. And, I suppose my point about P=NP was that if we had a general scalable global optimization solver, then it would have all sorts of implications outside of c
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by kxyvr 9y ago
I'm also curious what this adds that's new. I'll add one other bit: If anyone ever claims they have an efficient global optimization algorithm for continuous optimization, ask whether or not P=NP. We can encode the integer
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by kxyvr 9y ago
Other commentators have already shown that this is easily solvable with systems like MATLAB, Octave, or Wolfram. I will add, though, that I believe that the potential pitfalls of the above are still more due to modeling error than floating
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by kxyvr 9y ago
I'm a professional mathematician and, candidly, most people in my subfield don't really know that they exist. I do, and would love to use them, but I find them very difficult to use and don't have good examples of proofs rel
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by kxyvr 9y ago
I've been interested in Modelica for some time and didn't know if someone could answer a few questions. I'm interested in building what I call nodal models, but basically these are things like multiphysics models similar to
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by kxyvr 9y ago
I do consulting work with scientific and engineering firms and I'll contend that it still largely holds. For me, the trick wasn't to look at how the engineers dress. Rather, it's how management dresses and they tend to adhe
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by kxyvr 9y ago
I've posted this on HN before, but in the world of optimization, I really like the book Convex Functional Analysis by Kurdilla and Zabarankin. It's the only book that I know of that gives a comprehensive treatment of when a solut
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by kxyvr 9y ago
I'm sure it will for some people. That said when I was 21, I was diagnosed and treated for stage 3 melanoma and I can assure you the drugs that I took during that year were not cheap. At this point, it's been more than a decade
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by kxyvr 9y ago
Nice tool, but a lot of the market is being altered in a way that blows out these savings. For example, I run my business and my overall tax rate last year was 28%. However, when I account for healthcare premiums and hitting my out of poc
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by kxyvr 9y ago
Alright, so I do research in and produce optimization tools professionally. From my biased point of view, someone is better off learning generic optimization theory and algorithms rather than specialized versions like convex or stochastic
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by kxyvr 9y ago
I'm more curious about when this was a reality beyond lifting someone out of direct poverty. Alright, I run a business, so let's talk some numbers in the modern day environment. As a pass-through entity, all business income is co
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by kxyvr 9y ago
My cousins like to play and watch League, but I never did. That said, we did an impromptu road trip to LA awhile back to watch some professional games live. As someone who never played and only watched a handful of games, it was really a
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by kxyvr 9y ago
That's fair. And, certainly, there's nothing wrong with a glue language geared toward computation. Then, from my perspective, the question for me becomes whether Julia provides an good resources for the end application. Stuff l
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by kxyvr 9y ago
To be sure, I agree and think it's the right thing to do to hook into external libraries when they provide the functionality we need. That's just an extension of the right tool for the right job philosophy. Alright, so I write nu
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by kxyvr 9y ago
I keep hearing this, but each time I look at the links on HN, I see that the high-performance libraries being cited are those still written in C, C++, or some other low level language. For example, even in this link, the code is tying into
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by kxyvr 9y ago
I did a quick search and it looks like Wikipedia has a reasonable summary: https://en.wikipedia.org/wiki/Net_metering_in_Nevada At issue was whether or not homes with solar could sell their electricity at the retail ra
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by kxyvr 9y ago
Yeah, I'll disagree. I work in the field and classic control algorithms are incredibly pervasive and are in no risk of being supplanted. Linear quadratic estimators, Kalman filters, are still used everywhere. Extended Kalman filters
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by kxyvr 9y ago
I appreciate that you and your company is doing this. Many years back, I sat on the graduate school acceptance board for my department at a tier-1 research university. Before we were given the applications, we were given a spreadsheet wit
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by kxyvr 9y ago
Part of what you wrote elicited a deep sigh on my behalf. Transferring power from owners to workers is not literally communism, at all. Transfers of power happen all the time when new legislation is passed to create worker protection la
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by kxyvr 9y ago
I'm wondering if someone could clear something up for me. There's the me_cleaner project that the above guide relies on in order to generate the new BIOS image. However, I thought me_cleaner could be run directly without dumping
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by kxyvr 9y ago
Student debt is half of the problem. Really, the problem is that the primary source of funding for a university is the state. Over time, states have reduced the amount of money they give to schools because they can increase tuition to mak
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by kxyvr 9y ago
As a note, this feature isn't exclusive to Julia. For example, Eigen implements something similar and the requirements for doing so are specified here: https://eigen.tuxfamily.org/dox-devel/TopicCustomizing_Custo.
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by kxyvr 9y ago
This is an important point, but I don't think it's insurmountable for a broader group of people. Though technically not required, I think it helps to know a good deal of mathematical theory as well in order to check properties tha
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by kxyvr 9y ago
Yes, I believe that dense methods on single core architectures have been well ported. Of course, even there, it wasn't until I believe Eigen that we were able to moderately easily run automatic differentiation over the algebra and fac
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by kxyvr 9y ago
By the way, if anyone is interested in good open source opportunities, computational linear algebra is nowhere near a solved problem and there's good opportunity for impactful contribution. The computational challenges of the algebra
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by kxyvr 9y ago
Here's a longer answer at superuser: https://superuser.com/questions/563851/how-isp-sees-the-http... But, yes, since ISPs may be getting into the business of analyzing and selling our browsing habits, https l
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by kxyvr 9y ago
Thanks for the links! I haven't looked at multi-markdown before, but I had looked at a variety of pandoc/markdown/latex solutions in the past. In truth, it's still on my radar and I do think that pandoc represents a re
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by kxyvr 9y ago
Ha! I actually didn't know they could be defined locally, so that does help. Thanks! There really are a bunch of little things like this, like looping over subscripts, that would be nice as well. LuaTeX may make these easy, but, ag

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