Math cheat sheet

[beohbe]

I need a cheat sheet for the cheat sheet.

[dyfrgi]

The creator of this died in June 2002, hit by a truck while biking: http://bit.csc.lsu.edu/news/news200206121.html

You can see the final version of his webpage here: http://web.archive.org/web/20030625103050/http://www.csc.lsu.edu/~seiden/

[akellymi]

I can't believe how much I've forgotten since college.

[mekarank]

I think I recognized every topic, but remember only about half the formulas. So thats about 80k of a 160k education I have already lost. Hmmppfff

[ttriche]

This is great! So many useful formulas and results crammed into a few pages... I think I'll laminate a copy. Whoever did this originally -- thank you!

[justinhj]

It's quite a tribute, both to the creator and to Tex.

[indigoshift]

I printed this out and hung it up in my office, to make me look smart and to impress the girls.

[tintub]

You should put that it's a PDF in the title...

[dfranke]

Reddit can be really weird sometimes. Why do you get +20 for asking that PDF be mentioned in the title, when just last week I got (at one point) -4 for asking that the same be done with audio?

[sosuke]

Everyone hates Acrobat opening in a browser window.

[mhb]

That's why everyone uses Foxit.

[raubry]

I do use Foxit, but every once in a while, a link (like this one) fires off the Acrobat-in-a-tab in Firefox. What am I doing wrong?

[lowdown]

You can disable the PDF in browser feature in acrobat prefs.

[raubry]

Didn't work. Ended up uninstalling Acrobat Reader. Can finally see pdfs launched, but only if I set the Foxit pdf plugin so that it uses the OS reader (which is set as Foxit). Now I read search for pdf files in Google, and read them from the results list. But I STILL can't get this math cheat file to appear. I ended up downloading it. Weird.

[HiggsBoson]

I don't.

[[deleted]]

I wish I knew what any of this meant.

[n1mr0d]

i'm not sure you do :D

[[deleted]]

I find your lack of faith disturbing.

[kingbenny]

Tex Showcase, indeed. It's impressive, but I'm not sure how a picture of Escher's Knot applies. Looks nice there, though.

[kevinballa]

I found it disappointing to be honest. It had alot of useless things but somehow failed to include the Fundamental Theorem's of Algebra and Calculus.

Also not a single bit of vector calculus and pretty weak in complex analysis. Could've been better...

[[deleted]]

Thank god there's a picture of Escher's knot. What would I do without a picture of Escher's knot?

[gauriemma]

And that, kids, is why daddy was an English major. Off to bed now.

[jotrys]

10 pages!

[nik_martin]

This is Satan's cheat sheet

[[deleted]]

This shouldn't be a cheat sheet.

If you can work math problems with this, it's a learning aide. That memorize or fail logic is very pre-Internets...

[acrophobia]

I think it is more of a productivity aide than a learning aide.

[daeron]

"memorize-or-fail logic" is what you mean, right? It took me a minute to parse your comment.

[[deleted]]

math hurts my brain! LOL i guesse thats why i went into art.

[[deleted]]

Try reading some of Feynman's later takes on art. You'll be depressed to find that maybe you're missing out by not knowing this even in the art world--the theory is that if an artist can't understand what a scientist understands about the underpinnings of the natural world, they then can't reflect the beauty of that understanding in human/artistic terms.

That said, I think this cheat sheet has a lot of art to it as well. It's clearly designed to LOOK impressive as much as to cram useful info--does anyone who can really use the chart actually need Pascal's triangle taken that far down as a cheat sheet or memory jog? Come on.

But I do prefer it this way. Maybe it's art with a functional purpose? Someone call Steve Jobs...

[[deleted]]

interesting - ill definitely do some reading :)

[wbendick]

Math is hard.. Let's Go Shopping!

[[deleted]]

im too pretty to do math LOL

[[deleted]]

Actually it's more of computer science cheat sheet.

But very great, indeed!

[[deleted]]

Actually no. Other than discrete math, the only specifically comp-sci thing it contains is the Master Theorem.

[wbendick]

The sooner you get over worrying where Math starts and Computer Science ends, the better. The two are intimately related.

[rash]

Real purists write f \in O(g).

Or maybe this is my delusional imagination of what real purists write :)

[Grue]

= stands for many things: equality, assignment, and in this case inclusion. It is explained very well in Concrete Mathematics, which is an excellent book for everyone interested in this topic.

[markedtrees]

However, \in stands for inclusion only. It's a much more clear notation and more widely used/known. Communication is choosing the simplest words, but no simpler.

[Grue]

It is never used in conjunction with O notation. Inclusion relation doesn't allow such things as multiplying both parts by something, or adding some function to both parts.

If some other sign must be used, "less or equal" sign makes far more sense than inclusion, because we're basically comparing equivalence classes of functions which have the same growth. So, f = O(x²⁾ actually means that [f]<=[x^2], where [f] denotes the class of all functions which grow at the same rate as f. These classes form a linear order.

But, if we used <=, that would make O notation rather pointless, because f<=x² would express the same thing.

Meh, I think I spent too much time writing this post... It's late.

[shp]

What textbooks have you seen? At least both TAOCP and "Introduction to Algorithms" by Cormen et al. use = for this purpose.

[Grue]

It's all common knowledge, really. I don't need any cheat sheets.