ivan_ah

60 ms·

511.
by ivan_ah 9y ago
Very cool: closure + associativity + identity + inverse properties we use for addition and multiplication = group structure. See https://en.wikipedia.org/wiki/Group_(mathematics)#Definition Simplify and connect for the
512.
by ivan_ah 9y ago
Nice. The Websockets events as HTTP request response is similar to the architecture of Django Channels.
513.
by ivan_ah 9y ago
I think personal comms + general channel announcements are OK. Just close slack and when you come back check any specific communications for you asynchronously, or if you want to catch up on "what's been up" you can browse me
514.
by ivan_ah 9y ago
Shameless plug, I wrote a book that you can read and learn the first-year science essentials: calculus and mechanics, for the price of a 24 case of beer: https://www.amazon.com/dp/0992001005/noBSguide You won&#x27
515.
by ivan_ah 9y ago
Here is a paper that shows Coq proofs of two famous theorems by Shannon: the source compression rate of H(X) and the channel capacity of I(X,Y). https://staff.aist.go.jp/reynald.affeldt/documents/affeldt-i... I wo
516.
by ivan_ah 9y ago
3 mo seems steep as finder's fee. I've heard of 1mo/2mo, but never 3mo.
517.
by ivan_ah 9y ago
This ^ is worth its weight in gold. The ability to adjust speed in increments of 0.1 is really good. You can watch a lecture at 1.7x 1.8x or if the speaker is slow, then up to 2.3x and more... On the topic of 2.3x video watching, I've
518.
by ivan_ah 9y ago
I'm with cosmic_ape regarding the recommendation for SymPy. Write the two lines as symbolic expressions `expr1` and `expr2` then run `simplify(expr1-expr2)` to check if the answer is zero. If you want to start with LaTeX then the parse
519.
by ivan_ah 9y ago
With caveat that A' is Hermitian transpose (transpose + complex conjugate) when A has complex entities, and you need A.' if you want the real transpose. For matrix A with real coefficients both operations are the same.
520.
by ivan_ah 9y ago
Yes, human in the loop is definitely good. Reminds me a bit of the "Granny cloud": https://youtu.be/dk60sYrU2RU?t=12m (talk is worth watching from the beginning)
521.
by ivan_ah 9y ago
This seems relevant: https://en.wikipedia.org/wiki/Bloom%27s_2_Sigma_Problem I haven't read the paper myself and don't vouch for it, but I've heard two-sigma mentioned a lot.
522.
by ivan_ah 9y ago
Good points. I think the blog post would have benefited from a definition of the "education product" the author has in mind, because otherwise it remains a little vague. I can think of at least a dozen educational services and pro
523.
by ivan_ah 9y ago
You can use the BeautifulSoup API with the `lxml` parser: https://www.crummy.com/software/BeautifulSoup/bs4/doc/#insta... I've heard that `lxml` can choke on certain badly-formed markup, but it&#x27
524.
by ivan_ah 9y ago
Interesting picture showing corporate tax income relative to other sources in federal budget: https://upload.wikimedia.org/wikipedia/commons/f/fa/Share_of...
525.
by ivan_ah 9y ago
Very cool idea. It's so much better to see the steps of the solution rather than just ask for the final answer. With a little polishing, this could be better/faster than solving homework on paper! It would be really interesting t
526.
by ivan_ah 9y ago
Learning all the advanced math within a few years is a hopeless endeavour. It would take decades of hard work because there is so much out there, and we need to know all of it if you want to make progress (e.g. pull out a fancy-name theorem
527.
by ivan_ah 9y ago
I see programs as data (mostly atoms, tuples, and dicts) and a nested list of TODOs. Each todo is a sequence of tasks, but I don't necessarily assign names to the task parts or think of them verbally. The "local variables" ha
528.
by ivan_ah 9y ago
+1 for not needing Play Services. I've been running a free Android, and so far every app installed has worked fine, except push notifications, but I see that as a feature—less interruptions. Can you recommend a good free gmail client?
529.
by ivan_ah 9y ago
Another good "quantum sceptic" review paper is Emerging Insights on Limitations of Quantum Computing Shape Quest for Fast Algorithms by Sara Robinson : https://www.siam.org/pdf/news/100.pdf
530.
by ivan_ah 9y ago
Not all . Many quantum computing efforts are interested in using quantum systems to solve optimization problems, which seems more useful. Certainly simulation or optimization are most likely to happen within our lifetime compared to scalab
531.
by ivan_ah 9y ago
Also the missing accent grave on the letter "a" supports the Catalan hypothesis.
532.
by ivan_ah 9y ago
Very cool. It's like a CMS adapted for a research groups (a.k.a. labs --- note potential source of confusion since lab can also mean actual lab with test tubes etc). One thing that I found confusing is the lack of pricing info. Is this
533.
by ivan_ah 9y ago
For a simple caching solution that works well with requests, you can look at cachecontrol: from cachecontrol import CacheControl sess = requests.session() cached_sess = CacheControl(sess) response = cached_sess.get(&#
534.
by ivan_ah 9y ago
wow ngrok is nice...
535.
by ivan_ah 9y ago
Screenshots are useful, but diffs of screenshots are even more useful. You could maybe immitate the workflow used by wraith? https://github.com/bbc-news/wraith For example to setup screenshot diffs between an existing
536.
by ivan_ah 9y ago
These would make good interview questions too... the problems are pretty unique so it's unlikely someone can come prepared.
537.
by ivan_ah 9y ago
+1 for non-profits with a mission. There are many good projects out there, and they are often can't afford a full-time and experienced devs, so the addition of one competent person could make a significant impact. You'll definitel
538.
by ivan_ah 9y ago
This was a fascinating historical article. We should all appreciate TeX more. Yes it's 80s technology, but it will be really hard to replace... Interesting to note the TiKZ example uses spheres and not boxes — boxes look less good beca
539.
by ivan_ah 9y ago
google-cached version: https://webcache.googleusercontent.com/search?q=cache:Rd2bFx...
540.
by ivan_ah 9y ago
I highly recommend Django for the backend. It's stable, feature complete, and mature. Python is good for you. You can start here: https://docs.djangoproject.com/en/1.11/intro/tutorial01/ Alternative

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