sgdpk

10 ms·

61.
by sgdpk 6y ago
Spaced repetition [1], they send you questions over increasing time periods to consolidate what you learned in the long term. [1] https://en.wikipedia.org/wiki/Spaced_repetition
62.
by sgdpk 6y ago
I agree with this! I prefer reading Axler's 2nd edition because it is a lot less distracting.
63.
by sgdpk 6y ago
Do you know how to install the library in a Python environment?
64.
by sgdpk 6y ago
This really depends on the level of math you're expecting for your intuition, but for me it really clicked when I understood it in terms of linear algebra. A function is like a vector, but instead of having two or three dimensions you
65.
by sgdpk 7y ago
This actually is the long division algorithm. Usually the positional system hides away the powers of 10 (or 2 in this case) so we can do it mechanically and fast. He is just going through the algorithm explicitly.
66.
by sgdpk 7y ago
Reading "Why we sleep" right now and enjoying it very much. It covers a lot of research, and Walker manages to tell a story and get you the bird's eye view of what the research means. Definitely recommend.
67.
by sgdpk 7y ago
Interesting! The form of the solution can be written conveniently in base 3.
68.
by sgdpk 7y ago
I really like this answer on Quora [1], about the precise example you mention. The author is worth following for his insights, and the clear way he talks about math. [1] https://qr.ae/TaQ8y2
69.
by sgdpk 7y ago
Indeed, in general we are not aware of how much we dream, because we don't remember. I should have specified better. Weed and alcohol specifically suppress REM sleep, where most of dreaming happens. Suddenly stopping weed or alcohol le
70.
by sgdpk 7y ago
According to Matthew Walker (Berkeley researcher on sleep), it does affect sleep. See this small clip, starting at 2:14. https://m.youtube.com/watch?v=lRp5AC9W_F8
71.
by sgdpk 7y ago
Just to add that this is not about QWERTY. The portuguese and spanish layouts are QWERTY, but still a pain [1]. Typically the best is to look for the US QWERTY layout or the international layout [2], the ones that have easily accessible bra
72.
by sgdpk 7y ago
> "You have to cast your data back to a list/tuple after using enumerate() and map()." I think he means you don't get a list/tuple back after applying enumerate and map. That's actually lazy evaluation and i
73.
by sgdpk 7y ago
Exactly :) The polish notation approach is also pretty interesting. I wasn't aware it had the full power of parenthesized expressions. If you are interested I can share my code (simple Python).
74.
by sgdpk 7y ago
Coincidentally I was just solving (a variant of) this problem today. The approach I took is taking the list of numbers and recursively replacing each pair (x, y) with x+y (replace + with any operation), until one element remains. You can se
75.
by sgdpk 7y ago
This fact is slightly misleadin, because the data shows that there are more people living with a spouse _or_ a partner than with parents. So there seem to be two reasons for these figures: a larger fraction of people living with parents and
76.
by sgdpk 7y ago
Unfortunately the most compelling evidence I've seen seems to confirm the weight set-point (or set-interval) theory. A good book that summarizes main results is Sandra Aamodt's "Why diets don't work". That's n
77.
by sgdpk 7y ago
That's interesting. Do you have a page/contact? I am looking for projects in this area
78.
by sgdpk 8y ago
Oops, you're right. I hope it happens.
79.
by sgdpk 8y ago
I agree. It seems to me that Facebook's Messenger and WhatsApp are fundamentally incompatible. With Messenger, you can open Facebook/messenger.com/your phone and see all your messages. With WhatsApp, you have no such option,
80.
by sgdpk 9y ago
Yes, that's right. Addition is just applying the transformations separately to the same vector and adding the result. So what this is saying is that if you apply λI to a vector in that particular direction, then there is nothing left t
81.
by sgdpk 9y ago
You can think of it in these two steps: 1. λI stretches every vector (the whole space, really) by a factor λ. 2. Saying that the function is not injective means you lose information: when you apply it on some object and get a result, you ca