Mathematics all-in-one cheat-sheet (2013) [pdf] • Hacker News Board

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#21

Post by symplee » Thu, May 30, 2019, 5:24 AM UTC

Last page says "Page 212 of 330"

Pages 213+ are probably where they discuss cardinality.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#22

Post by sdan » Thu, May 30, 2019, 5:29 AM UTC

ac29 wrote: post #15

sdan wrote: post #6

First time I've seen someone use Keybase.pub. Last time I checked they gave out 250gb for free for everyone... this is a good use of that!

I wonder how long that can last before abuse kills the system. Some quotes from their page about KBFS [0]: "The 250GB free accounts will stay free" "we'll never run an ad-supported business" "we're not trying to make money" [0] https://keybase.io/docs/kbfs

Probably why they don't market it. If they did... like Dropbox, Dropbox would have to say goodbye to a lot of users, given that these users understand that Keybase doesn't have the efficiency or reliability that Dropbox has.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#23

Post by ashton314 » Thu, May 30, 2019, 5:33 AM UTC

ac29 wrote: post #15

sdan wrote: post #6

First time I've seen someone use Keybase.pub. Last time I checked they gave out 250gb for free for everyone... this is a good use of that!

I wonder how long that can last before abuse kills the system. Some quotes from their page about KBFS [0]: "The 250GB free accounts will stay free" "we'll never run an ad-supported business" "we're not trying to make money" [0] https://keybase.io/docs/kbfs

How is Keybase funded anyway? They say they’re hiring, so money is coming from somewhere.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#24

Post by AstralStorm » Thu, May 30, 2019, 5:33 AM UTC

_2d30 wrote: post #18

daveFNbuck wrote: post #13

I got a B in probability because I didn't write a proof of the central limit theorem on the allowed cheat sheet for the final exam. So of course it's the first thing I looked for on this one. It's not there.

Aren't most proofs of the CLT pretty extensive?

There are a few short ones going from area integral comparisons.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#25

Post by imedadel » Thu, May 30, 2019, 5:39 AM UTC

One day, I'll make an Anki version of this.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#26

Post by zw123456 » Thu, May 30, 2019, 5:52 AM UTC

Reminds me of the old Schaum's Outlines, I still have a couple of them on the book shelf from college days, saved my bacon many times.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#27

Post by sunstone » Thu, May 30, 2019, 5:56 AM UTC

You know you're in for a head banging when the Table of Contents is 25 pages long! :o

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#28

Post by lisper » Thu, May 30, 2019, 5:57 AM UTC

gizmo686 wrote: post #11

alanbernstein wrote: post #10

Earlier quoted context omitted.

Some believe the pi version is superior due to the inclusion of three operators (+, *, exp), and five numbers (0, 1, i, e, pi) which are all fundamental in some sense. The tau version omits the + and the 0.

e^iτ + 0 = 1 Fixed.

e^iτ = 1 + 0

Fixed^2

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#29

Post by derefr » Thu, May 30, 2019, 5:58 AM UTC

trilinearnz wrote: post #16

I like the idea of this, but I'm not sure that "cheat sheet" is the best term for it, given that it weighs in at quite a few pages (191 physical).

I believe that this sort of collection of tables is commonly called an “almanac”—but maybe only when the subject is of practical use.

Re: Mathematics all-in-one cheat-sheet (2013) [pdf]

#30

Post by halfelf » Thu, May 30, 2019, 6:03 AM UTC

Find a bug in page 39: y' is Lagrange's notation while dx/dy is Leibniz's.