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free-malloc

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投稿

Traditional and Modern Colour Theory

huevaluechroma.com
2 ポイント·投稿者 free-malloc·4 年前·0 コメント

Ask HN: What makes a good 1-on-1

7 ポイント·投稿者 free-malloc·4 年前·3 コメント

Wheatstone Bridge: A (Not So) Honorable History

youtube.com
1 ポイント·投稿者 free-malloc·5 年前·0 コメント

コメント

free-malloc
·4 年前·議論
Quanta is a gem.
free-malloc
·4 年前·議論
Do neural networks count as biomimicry? Are there good examples of software mimics life.
free-malloc
·4 年前·議論
As someone who met my wife on OKC, this is sad. They valued user engagement over user engagement.
free-malloc
·4 年前·議論
Always go on a second date if they are respectful and genuinely interested.

Date obese people. They deserve love as much as anyone else, but aren't treated that way.

Try to date divorced men with children since you know they most likely value children, vs a 40yo bachelor which indicates the opposite.

edit:

Point is you know exactly what you value: a family man to love and build a happy family.

You must accept that you are deeply marginalized in this situation given the time frame, and the realistic response is compromise. Drop all other standards and focus on what you actually value: love and family.

Filter against general attractiveness and fitness. Filter for words like "father" and "family". Filter for short men. Etc. Etc.
free-malloc
·4 年前·議論
He's got a love-to-hate personality who is able to capture the limelight of journalist. This makes him seem like a firebrand to suckers who love him. They play off each other, making him into a massively famous celebrity.
free-malloc
·4 年前·議論
I'm bummed out by the content of the article. I was hoping it was about the semantics of web forms and better ways to architect webpages.
free-malloc
·4 年前·議論
I think this is nearly entirely wrong. It's entirely about power and god.

Xi Jinping has cracked down on Christianity shutting down many churches. China has other ethnicities besides the Han, which don't speak Mandarin. If the Uyghurs had no faith they would be safe.

There is little room for religion unless the religion is centralized and submissive to the state. In some sense religion undermines the state.
free-malloc
·4 年前·議論
I did not re-member it.
free-malloc
·4 年前·議論
> For the ED25519, the key size should be 256 or larger.

This made him seem like a non expert. ED25519 is 256 bits always: https://ed25519.cr.yp.to/
free-malloc
·4 年前·議論
Don't forget pistol whipping the application just because it was written in php.
free-malloc
·4 年前·議論
This. It might suck financially but perfect is the enemy of possible.
free-malloc
·4 年前·議論
If a crib needs a gate it should be lower down.
free-malloc
·4 年前·議論
What cipher does the machine use?
free-malloc
·4 年前·議論
Why do you want to type faster?
free-malloc
·4 年前·議論
This is why I'm here. Thank you.
free-malloc
·5 年前·議論
This. Every academic field has its own language, culture, and body of knowledge it regards as "fundamental." To go from reading English to reading a CS paper involves learning these.

And this takes a metric fuck ton of practice. There is no royal road.

IMO, you should probably start with easier material until you strengthen these muscles. Some examples of friendly CS texts that comes to mind are Programming Pearls, the C programming language, or the SQL paper by Codd https://www.seas.upenn.edu/~zives/03f/cis550/codd.pdf

I'd be curious what texts other people would recommend for someone who is a student getting a bachelor's degree in CS.
free-malloc
·5 年前·議論
Let me try (and probably fail) to translate some of that.

S_n is the collection of permutations on n symbols with a multiplicative structure. In python

from itertools import permutations

n = 6

S_n = list(permutations(range(n)))

multiply = lambda alpha, beta: [alpha[x] for x in beta]

This is the reason why Substitution-Permutation networks interleave permutations with non-permutations. Two permutations in a row is just a permutation. "Representation Theory" is the art of taking such multiplicative structures and associating every object with a matrix so that the matrix multiplication encodes the original objects multiplication. This is useful because mathematicians know so much about matrices.

For example if you define

matrix = lambda perm: [[1 if i == j else 0 for j in range(n)] for i in perm]

matrix(alpha) * matrix(beta) == matrix(multiply(alpha, beta))

However, it is desirable to represent it as matrices in a more "efficient manner". For example S_3 can be written using only two dimensions. Representation theory deals with stuff like minimal representation.

If you snake from the bottom of young's lattice upwards to a specific diagram you can record the information into a young tableau by writing in the cell when it was added. Young tableau are very mathematically rich, but here is an "application" of them.

If you have a balanced parenthesis (the dyck langauge), [[[][]][]] and you record two list of when you open and when you close

[0, 1, 2, 4, 7]

[3, 5, 6, 8, 9]

you get a two-by-n young tableau, since the grid is increasing horizontally and vertically.

Other special shapes of young tableau can encode other interesting structures. Also see TAOCP V3 5.1.4, or google the RSK correspondence.

edit 1: newlines edit 2: fixed python
free-malloc
·5 年前·議論
Let me help you: https://news.google.com/search?q=%22world%20news%22%20when%3...

If you want news, you should use their news product, not their general search. Also, the word "news" alone is nearly meaningless. If you want world news, type "world news", if you want sports news type "sports news".

If you want something timely, you can filter to the last 24 hours, instead of looking for something that is regarded as important from any time in the past.

Help Google help you.