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Intro Adv Math Book by Clara Dirrystock - Wed, 20 Jan 2016 20:37:00 EST ID:0k+KCTnX No.15027 Ignore Report Reply Quick Reply
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For those who've had experience with this class about proofs, do you think this book is necessary?

1 posts omitted. Click Reply to view.
Augustus Blollerville - Wed, 20 Jan 2016 22:25:34 EST ID:Dk8yywxc No.15029 Ignore Report Quick Reply
There was an extra "understanding" in my post but you should be able to figure it out if you're taking that sort of class
Doris Grimman - Thu, 21 Jan 2016 16:47:58 EST ID:J4OUpAxW No.15030 Ignore Report Quick Reply
Can you prove it B)

But yeah I will take your advice. Proofs are probably my most hated part of math though. Didn't realize that I was taking a whole course on them.
Albert Pickridge - Thu, 21 Jan 2016 19:43:00 EST ID:Dk8yywxc No.15031 Ignore Report Quick Reply

Proofs are the best part of math! You take that back!

Games throwing math at you... by Edward Hondermeck - Tue, 03 Nov 2015 23:19:50 EST ID:tE5uLpV5 No.14963 Ignore Report Reply Quick Reply
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I've just reinstalled Vampire: The Masquerade - Bloodlines to play the Antitribu mod. In the mod, they've added a locked door to the Tremere Chantry downtown that cannot be picked open, but instead requires a 4 digit code to open. A piece of paper is added on the table in the room you find Strauss and it has these equations on it, and I'm pretty sure that the values of the letters are going to be my 4 code digit. The problem is I have no idea how to figure them out.

Can /math/ give a gamer a helping hand?
If you can tell me the answer straight up, great, but if anybody feels like telling me how to solve the problem and others like it in the future, it'd be much appreciated.
3 posts and 1 images omitted. Click Reply to view.
Sidney Clommerhall - Thu, 07 Jan 2016 13:33:32 EST ID:gEBlLN+c No.15016 Ignore Report Quick Reply

not OP but I did graduate highschool. Never learned matrix shit or anything


so this matrix thing, Im reading about how it works and so far I understand it, at least I think I do.

given the equations OP listed my matrix should look something like this right?
2a -b 0 8d -41
0 4b 6c -d -11
4a 7b 2c d -10
9a 12b -3c 2d -25

and then I just do row reduction?
should I be including the numbers without variables in the rows? also row 2 is the row I made for 4b+6c-d-11, am I right to put a zero in the first column because there is no value of a in this equation?
Oliver Bodgewell - Fri, 08 Jan 2016 15:28:42 EST ID:gEBlLN+c No.15018 Ignore Report Quick Reply
nb but holy shit I remember formatting the fuck out of that matrix yesterday so it was legible but its totally not
Nigel Drenderman - Sun, 10 Jan 2016 13:47:20 EST ID:3lJiHBSn No.15020 Ignore Report Quick Reply
it's so easy man put it in wolfram

install octave


A = [4 7 2 1; 9 12 -3 2; 0 4 6 1; 2 -1 9 8]
B = [10 25 11 41]

C = A\B

The result C will give you your answer in the form

C =
Comment too long. Click here to view the full text.

high thought by Nigel Drenderman - Sun, 10 Jan 2016 00:41:57 EST ID:3lJiHBSn No.15019 Ignore Report Reply Quick Reply
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my understanding is that people don't like gravity because it's weak and it doesn't make sense why it's so weak

my thought is that maybe it isn't as weak as we say it is? a heavy object dilates time around it right? so hold that thought

if I told you i built a time machine, what are a few things you'd expect from my machine? for one, it probably consumes a lot of energy right?

maybe gravity's true power comes from being able to dilate time

maybe gravity dilates time through an unknown force?

maybe I have no understanding of general relativity at all.

if we can control gravity, we can control time and space

am i totally wrong here?
Fucking Simmletore - Wed, 13 Jan 2016 08:03:43 EST ID:Zrg8t7vN No.15021 Ignore Report Quick Reply
Well, you at least seem to know what gravitational time dilation is. For those not in the know, gravitational time dilation is the effect of time ticking slower closer to sources of gravitation (relative to clocks at higher gravitational potential). This is predicted in Einstein's general theory of relativity and has been confirmed in experiment. While gravity can be thought of as a force, it is distinguished from the other forces as the curvature of spacetime itself. This means that the force you feel standing on the Earth is fundamentally the same as the force you would feel standing in a rocket ship accelerating at ~9.8 m/s^2 in microgravity.

Compared to the other forces (electromagnetism, strong force, weak force), gravity is very weak. And you're right, the reason for this is not understood. It's one of physics' unsolved mysteries called the hierarchy problem.

The only sure methods of time travel, such as orbiting close to a black hole, do indeed require immense amounts of energy e.g. the thrust required to lower and raise the spacecraft into and out of orbit around a black hole. By such means, you can only travel into the future. Time travel into the past is probably impossible.

Lrn2 math for a smart guy by George Debblebanks - Sun, 06 Sep 2015 01:34:58 EST ID:N0VIeVLI No.14878 Ignore Report Reply Quick Reply
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Hey folks, I got a big ol' question and I'm hoping there may be some people here like me who could give me some good advice. I'll try to spare details but I have an.. issue. My issue is I'm too smart damnit. I didn't go to college for a really dumb and unfortunate reason, and while my issue would have surely popped up there it wasn't why I didn't go. But at the moment, all I have under my belt is high- school geometry and algebra II. I would have gone higher, but along with it being drilled in my head that "poor people don't go to private schools" and so I'm already over qualified for the schools I have to choose among, I just hated how slow everything went. Maybe none of it matters because I went to a dreadfully average school, but I was kind of the freak. After commenting about the insane amount of homework assigned for simple concepts my teacher simply refused to believe I was capable of doing it all in my head, even after I proved it on the spot. I was the freak in academic challenge, I'm in my schools hall of fame (lol), I got a 35 on the ACT and it was so damn easy Idk how I didn't get a 36.

I guess I'm venting a little but my point is I'm pretty smart, or at least I think I am. I want to just teach myself but I'm not sure where to start and I'm impatient. I tried Khan academy and I'm sorry but I feel like that site is remedial as fuck. I can't handle how slow it goes.

So my question is to other autodidacts. What sites or books or series of books would you recommend for someone who doesn't really know much but also isn't for dumb guys? I guess my starting point would be trigonometry and calculus.

And another question I have is, where do I go from there? I'd like to get a well rounded knowledge of all the different subjects. So at the moment, I'm not looking to dig into one specific subject too much. I want a working knowledge that would allow me to dig in where I want after I'm actually capable of understanding the subjects in the first place.

Computer science, programming, calculus, physics, quantum...stuff... statistics, pure math, the different planes, that's about the extent of what I even…
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6 posts omitted. Click Reply to view.
Defalt503 - Sat, 07 Nov 2015 10:36:46 EST ID:GNz4wLxQ No.14967 Ignore Report Quick Reply
AOPS (Art of Problem Solving)
It's expensive, but very rigorous in its coverage.
Phoebe Gottingnadge - Sun, 20 Dec 2015 05:54:08 EST ID:4PxD5/q2 No.15006 Ignore Report Quick Reply
>hurr durr i'm so smart i wanna learn mafs but i cant even use teh googles and muh brain power 2 narrow down a gud source
lel i hope you don't talk to people irl with that attitude
Nell Crorringbid - Mon, 21 Dec 2015 09:10:59 EST ID:GFadmWCF No.15007 Ignore Report Quick Reply
E = mc^2

Calc promblem help, by Augustus Demblestig - Sun, 11 Oct 2015 09:08:49 EST ID:q3ZVtHN5 No.14929 Ignore Report Reply Quick Reply
File: 1444568929865.png -(9425B / 9.20KB, 662x157) Thumbnail displayed, click image for full size. 9425
How do I solve this for m or for n? I.e. get something like m =....

Is there some general way that does not depend on the function of P(x)?

Otherwise P(x) = sin^2(x)
3 posts omitted. Click Reply to view.
Hedda Tillingman - Mon, 12 Oct 2015 08:21:13 EST ID:q3ZVtHN5 No.14934 Ignore Report Quick Reply

I worked it out the long way, eventually and got the same solution. Thanks guys.
Barnaby Dommerbick - Sun, 06 Dec 2015 09:23:04 EST ID:kb5uOcCo No.14992 Ignore Report Quick Reply
It doesn't have to be periodic.
Imagine a function that is zero everywhere outside of some interval, and one inside the interval. If this interval is larger than b-a then, for a fixed n, there will be a continuous range of m for which the statement is true, unless n is chosen such that the RHS is neither zero nor b-a (that is, the integral is taken over a region neither entirely in the zero part of the function, nor entirely in the non-zeropart), in which case there are only two values of m that satisfy it.
The condition in OP's pic defines a subspace of R^2, which for the function above is not connected (try plotting it). It is interesting to consider the different possible subsets of R^2 you can get with various classes of functions.
William Murdham - Wed, 16 Dec 2015 20:12:35 EST ID:C1tA08VQ No.15004 Ignore Report Quick Reply
This depends on the OP equation holding for pecific a, b, as opposed to all a,b. In the latter cans, you do require P to be periodic.

In general, this seems to be a bit of a dumb exercise though, but I guess that's subjectiive.

Advanced Calculus by Ian Hibberkit - Mon, 10 Aug 2015 18:35:46 EST ID:AuFFnCvz No.14855 Ignore Report Reply Quick Reply
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Hey math,

I'm taking the first Advanced Calculus (intro to proof writing) course this fall. I've done some of the work in advance and am not too worried. What were your experiences in your homeland's analogous class?
6 posts omitted. Click Reply to view.
Caroline Fubberforth - Mon, 26 Oct 2015 13:56:36 EST ID:nDKmqEtd No.14954 Ignore Report Quick Reply
I'd like to see a game theory course graded this way.
Martin Hippershaw - Fri, 30 Oct 2015 22:31:17 EST ID:AuFFnCvz No.14961 Ignore Report Quick Reply
I go to a very science-y state university, so the math major is pretty competitive -- a positive thing, but then we have instructors who do this kind of stuff to weed people out. Pretty stressful, man.
Walter Nenderbury - Mon, 14 Dec 2015 02:09:04 EST ID:VQWIWcoe No.14999 Ignore Report Quick Reply
Do you have a copy of Galois' Dream? It's a nice text, you might like it.

I wanna be a master by Basil Fongerhood - Wed, 02 Dec 2015 06:52:11 EST ID:tkxf2V39 No.14988 Ignore Report Reply Quick Reply
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Can somebody here give me a beginning, to end list of how I should study complete field of math?
5 posts omitted. Click Reply to view.
Caroline Brookcocke - Sat, 12 Dec 2015 16:11:59 EST ID:k9kkb1hx No.14996 Ignore Report Quick Reply

This site tries to enumerate all proofs and how they are connected. You can't really do anything with it though and trying to learn Mathematics using it would be like trying to learn driving by watching assembly line robots build cars.
Hannah Fandale - Sun, 13 Dec 2015 12:10:00 EST ID:Dk8yywxc No.14997 Ignore Report Quick Reply

Yep that's the one.
Walter Nenderbury - Mon, 14 Dec 2015 02:01:28 EST ID:VQWIWcoe No.14998 Ignore Report Quick Reply
The correct answer is "it's impossible". There's already more math than a person could digest in a lifetime, and more is made/found every day.

But doing the standard progression arithmetic->algebra/geometry/precalc -> calc, then some proof fundamentals, then hit intro level of diff eq, linear algebra, combinatorics and probability, group theory, and you'll be in a good place to head off in whatever direction you like.

ie read off a programme listing for most undergrad math programs.

ti-83 window ranges by Samuel mcshoebat - Sat, 21 Nov 2015 16:32:15 EST ID:ONOBjqOA No.14985 Ignore Report Reply Quick Reply
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Hey got a question for /math/ i'm doing an assignment where I have to graph numbers in the double digit thousands (1600, 1500 etc) what are the best ranges to set on my window so I can be able to view the graph efficiently?
Lydia Maddleworth - Tue, 24 Nov 2015 13:59:54 EST ID:J4OUpAxW No.14986 Ignore Report Quick Reply
i report yu

GRE prep help by Samuel Subblestone - Fri, 22 May 2015 18:34:24 EST ID:Kjt/my9S No.14740 Ignore Report Reply Quick Reply
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Hey quick question for you fine folks here at /math/

So I'm studying for the GRE using Gruber's complete guide 2015. There was a math question that confused me. Basically to get the answer you must divide two seperate equations by each other.

The question is: If A is 250 percent of B, what percent of A is B?

Eventually, there comes a point where we have A = 250/100B and x/100A = B.

After that the author says we divide the first equation by the second, so we get A/(x/100A)=(250/100B)/B.

After this it's fairly simple, I'm just having trouble grasping how we can divide one separate equation by another. Could one of you clarify?

Pic Related, it's a screenshot of the part I was talking about.
7 posts omitted. Click Reply to view.
Thomas Billingdale - Thu, 28 May 2015 23:49:32 EST ID:1XOUKwXv No.14759 Ignore Report Quick Reply
I just gotta vent this out, whoever wrote the solution to this in your homework up there is a fucking moron. This is a 1 step problem
A = 2.5 * B
(1/2.5) * A = B

Go slap whoever the fuck gave that solution to you
James Gurrychetch - Mon, 01 Jun 2015 18:05:14 EST ID:nQdck93t No.14769 Ignore Report Quick Reply
Hey I just wanted to reply and say thanks for the help to you and everyone else in this thread. When you write it like that it is very simple, I don't know why he gave such a complicated solution. NB
Simon Geffingfedging - Sat, 21 Nov 2015 04:11:03 EST ID:SYdGx2TL No.14984 Ignore Report Quick Reply
dumb jolly african-american confirmed

Is this legal? by Jarvis Blathershit - Wed, 11 Nov 2015 17:34:08 EST ID:6QpDX4yc No.14970 Ignore Report Reply Quick Reply
File: 1447281248240.jpg -(835996B / 816.40KB, 1920x1080) Thumbnail displayed, click image for full size. 835996
I think it can't be done... but how else can I simplify this? I was years ago I had to do that...
3 posts omitted. Click Reply to view.
Phineas Bungold - Wed, 18 Nov 2015 11:45:09 EST ID:i84x+n57 No.14981 Ignore Report Quick Reply
>As long as x+y is nonzero, this should work.
Pfft, never mind. If that were the case, the original expression would be undefined as well.
Eliza Sudgefidge - Thu, 19 Nov 2015 00:05:39 EST ID:aYPLZoUV No.14982 Ignore Report Quick Reply
1447909539540.gif -(237904B / 232.33KB, 640x480) Thumbnail displayed, click image for full size.

>Is this legal?

No, that will get you 5 to 7 in state prison. But you'll be out in 3 1/2 with good behavior.
Albert Bidgedock - Thu, 19 Nov 2015 01:46:52 EST ID:GKhdNJGT No.14983 Ignore Report Quick Reply

Try again.

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