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ja3k

233 karma · joined October 4, 2019

Blogger at ja3k.com
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ja3k··on Ask HN: Who wants to be hired? (August 2021)
Location: Columbus, OH Remote: preferred Willing to relocate: yes, but only to Seattle and in the medium term (1-2 years from now) Technologies: python, JavaScript, tensorflow, PostgreSQL, Git, aws, angular Résumé/CV: upon request Email: jake@ja3k.com website: ja3k.com github: https://github.com/jakethekoenig

I'm currently a mathematics graduate student studying random matrix theory at OSU. Previously I have worked at Google, Palantir and IMC. I've decided Math research isn't really for me and am looking to transition back into Software Engineering. I have some experience in web development and Machine Learning.

I have a beginners mindset and am prepared to work hard and learn a lot.

ja3k··on Win at Risk by using systems thinking
Wow this is exactly the strategy I've played. I take it to the extreme and put literally all my soldiers on one territory.

The ideal situation is when an opponent ends their turn in a weak spot (likely if everyone is trying to secure territory) with 3-5 cards in hand and you have 5 in hand. Then you can cash in, eliminate them and end your turn with 6+ cards in hand in which case you get to cash in on the end of your turn (sort of a hack. I think the idea is the game designer didn't want it to be possible to start a turn by cashing in twice) and then you can actually secure your new territory.

I think people who try to claim a continent outside if Australia haven't really done the math on how long they need to hold the continent for it to pay off.

ja3k··on Prediction Markets: Tales from the Election
I had a similar experience on Predictit which I wrote about here: https://ja3k.com/blog/predictit

It's still very strange to me that the prices were so irrational.

ja3k··on What Is Social Cooling?
>Social cooling refers to the idea that if “you feel you are being watched, you change your behavior.” And the massive amounts of data being collected, especially online, is exxagerating this effect.

This is a strange perspective to me. I feel like I'm much more aware of being watched by the other users of a social media site when I post than of the inscrutable algorithms.

ja3k··on How to Memorize Faster with the Spaced Repetition Learning Technique
For people who already use anki there's a pretty nice chrome extension: https://chrome.google.com/webstore/detail/anki-quick-adder/g...
ja3k··on Prediction Markets Beat Polls
This is a reason things will get slightly out of line but not to this degree. You can (and I did) buy all the NOs in the Predictit electoral college market and get a guaranteed immediate return.

If you can buy n NOs for less than (n-1-0.1) on predictit you'll make money net of fees.

The bigger issue is trader limits. I could only take $50 worth of arbitrage because I can only own $850 worth of shares in each bracket. They also limit markets to 5k traders (which most markets have hit at this point) so other arbitragers can't come in and correct the prices.

ja3k··on Why books don't work (2019)
I often feel like writing comments is pointless and contributes to the sea of noise below top level posts, which I none the less often feel compelled to read. But what is a comment box but not an invitation to perform a free form exercise? If I read a whole blog post and don't have anything to say about it, what was the point?
ja3k··on Are we in an AI Overhang?
You don't have to wonder. In their paper: https://arxiv.org/abs/2005.14165 they state it has 0.7% accuracy on zero shot 5 digit addition problems and 9.3% accuracy on few shot 5 digit addition problems.
ja3k··on Teachers are ready to quit rather than put their lives at risk
I'm also against schools reopening in the fall (though I haven't done much research and don't hold this opinion strongly).

But it seems like holding people back semesters eventually adds up to something that's as bad as a death. These kids are never going to get that semester back. And if you think they enjoy the at home alternatives half as much, or learn half as much or value that time in their lives half as much it seems like on some level the equivalent of 1000s of person lifetimes of value have been lost. I wouldn't hold back everyone one semester in high school in exchange for even on the order of 100s of deaths.

ja3k··on Weird Constants in Math Problems
Beautifully, iterating any continuous function will yield a fixed point of the function if it converges.

https://en.wikipedia.org/wiki/Fixed-point_iteration

ja3k··on I Am Deleting the Blog
It's fair to claim Rowling's opinions are bad and it's also fair to say she was dumb to express them. But it seems like a non sequitur to point those things out when someone produces her as an example of someone being attacked for expressing their controversial opinions.

If you want an example of a current person with a true belief that is not accepted by their society that seems by definition hard to produce. Especially to an anonymous member of the society.

ja3k··on Economists study what happens when people stop using Facebook
I wonder if selecting your population via people who respond to a Facebook ad about studying quitting social media introduces any bias. (I can't see the article so I don't know what their ad actually was) I worry that the correct takeaway is people who are interested in the idea of taking a break from social media probably should. Maybe the study was sufficiently well compensated that people who feel positively about social media still felt participation was worthwhile?
ja3k··on Terence Tao Proves Result on the Collatz Conjecture
You can make sense of a percentage of natural numbers with the concept of natural density: https://en.wikipedia.org/wiki/Natural_density

The natural density of a set is the limit as N goes to infinity of the proportion of the numbers up to N which are in the set.

For instance the natural density of primes, squares and cubes is 0 and the natural density of even numbers is 1/2. But all these sets are infinite so the same cardinality.

ja3k··on Unsteady income in young adulthood linked to thinking problems in middle age
The article acknowledges that the study does not show causation and it seems a little strange to think a causal arrow in this direction is more plausible than the other direction. It seems like people who do better at thinking and memory tasks should also do better at their jobs and interviews and therefore be less likely to experience an income drop. To speculate on income drop's effect on mental acumen one would want to measure intelligence at the beginning of a career and in middle age and then correlate the delta to number and size of income drops.
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