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What's your power level? by William Drenkingold - Thu, 01 Dec 2016 01:21:19 EST ID:I4oaqfW8 No.15281 Ignore Report Reply Quick Reply
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I'm new to this site and it struck me as pleasantly surprising that there's a whole set of science&math boards. I am however rather skeptical about the average level of education here, so let's make a little survery:

  1. Age
  2. Degree
  3. Specialty
  4. Dream job/profession
  5. Plans for the near future and long term strategy
15 posts and 4 images omitted. Click Reply to view.
>>
John Drarrypon - Sun, 19 Mar 2017 15:09:40 EST ID:c0vo/Lfo No.15424 Ignore Report Quick Reply
>>15423
You shouldn't be paying for graduate school in anything technical. They should be paying you to teach and covering your tuition.
>>
Phineas Chacklestetch - Sun, 09 Apr 2017 02:31:07 EST ID:vrOFV9fT No.15462 Ignore Report Quick Reply
>>15285

I am at the end of an algebraic topology course right now, and my professor doesn't make much sense. I think I understand homology and cohomology pretty well, but spectral sequences have really fucked my brain. Since it's your area, do you think you can recommend a survey paper or something on it.

Other topics in algebraic topology have useful applications. Why should I give a shit about spectral sequences? Of course they are a generalization, but it seems it only has use for higher homotopy groups and etc.

Why should anyone outside of mathematics care about higher homotopy groups? They are notoriously difficult and at least to this day don't have the same applications that their homological counterparts enjoy.
>>
Phineas Chacklestetch - Sun, 09 Apr 2017 02:42:19 EST ID:vrOFV9fT No.15463 Ignore Report Quick Reply
>>15423
>>15424

This. If you get admitted you should get a teaching position with a survival wage. I am paid 20,000$ a year with tuition and health insurance free, and 100 students.

I could get more if I were to quit early and get a masters degree
>>
Fuck Billingfoot - Wed, 19 Apr 2017 19:41:06 EST ID:oXSM8l4D No.15476 Ignore Report Quick Reply
1492645266104.jpg -(114049B / 111.38KB, 595x397) Thumbnail displayed, click image for full size.
>>15281
  1. 25
  2. Finance
  3. Real-Estate Finance
  4. Professional Investor
  5. Having a hot wife that loves me and a large bank account.

I'd also like to point out that your inquiry means very little, as even the smartest of men at one point were nothing.
>>
Doris Bangershaw - Fri, 02 Jun 2017 03:11:28 EST ID:y3TGqPb4 No.15519 Ignore Report Quick Reply
>>15476

>Having a hot wife that loves me and a large bank account.

Women are incapable of love, except for themselves and their biological children.

If you have a sufficiently large bank account, however, you can easily convince one to pretend to love you. That's quite common.


Volume optimization? by Duffman - Sun, 09 Apr 2017 11:19:17 EST ID:Rhgh4/nK No.15464 Ignore Report Reply Quick Reply
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How does one go about doing these problems? are there formulas I'm missing for this? My professor covered this in the last 5 minutes of class and he was pretty unclear.
>>
Henry Mondlechot - Sun, 09 Apr 2017 14:54:04 EST ID:pPgJY+De No.15465 Ignore Report Quick Reply
1491764044751.png -(129384B / 126.35KB, 895x572) Thumbnail displayed, click image for full size.
Does this help?
>>
George Pittway - Sun, 09 Apr 2017 15:00:05 EST ID:Rhgh4/nK No.15466 Ignore Report Quick Reply
>>15465

Yes, Somewhat. Thank you


Ncea Level 3 calculus Help by David Bellamy - Sun, 26 Mar 2017 03:46:39 EST ID:yAgFpYsL No.15435 Ignore Report Reply Quick Reply
File: 1490514399540.png -(1302964B / 1.24MB, 1080x1920) Thumbnail displayed, click image for full size. 1302964
I need help with bloody conics
>>
HazeyNZL - Sun, 26 Mar 2017 04:02:02 EST ID:v+/egmbA No.15436 Ignore Report Quick Reply
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DICKS EVERYWHERE
>>
Ernest Binningstidge - Sun, 26 Mar 2017 10:59:32 EST ID:KW3RHxlP No.15437 Ignore Report Quick Reply
What have you tried? You can't just come to someone and ask for help without doing anything. We're not going to teach you the whole course here, since there are numerous places online you can learn these things.
>>
Henry Fattingdodge - Tue, 28 Mar 2017 21:15:01 EST ID:AvE/EBRJ No.15438 Ignore Report Quick Reply
Your friend looks like a fag, and underaged, so you probably are twice both. Ask a fucking question next time.


Measuring turds by Jarvis Smallford - Tue, 21 Mar 2017 20:36:07 EST ID:Yl5i51yi No.15427 Ignore Report Reply Quick Reply
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Ever wanted to be able to find the volume of your weirdly-shaped poops through a mathematical model? Try Calculus! Thanks, Newton and Leibniz!
>>
Basil Gunningfutch - Tue, 21 Mar 2017 22:28:39 EST ID:2BTsxPZ9 No.15428 Ignore Report Quick Reply
No love for Archimedes in here I suppose.
>>
Molly Poffingbury - Wed, 22 Mar 2017 19:55:35 EST ID:LCy6AKHb No.15430 Ignore Report Quick Reply
>>15428

Do not disturb my circles.


Maths is cool n shit by Straid Of Coolaphis - Fri, 28 Oct 2016 20:21:44 EST ID:g2pPf6fA No.15254 Ignore Report Reply Quick Reply
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Can we have a maths party thread moderators? Because maths is cool and shit.
6 posts and 4 images omitted. Click Reply to view.
>>
Fuck Tillingway - Tue, 21 Feb 2017 11:32:41 EST ID:j58znr37 No.15342 Ignore Report Quick Reply
>>15341
Are you trying to start shit m8?

Category theory is the new set theory, it's fucking foundational.
>>
Phyllis Fuvingbury - Tue, 07 Mar 2017 00:21:23 EST ID:vrOFV9fT No.15415 Ignore Report Quick Reply
>>15342

Nobody cares about the Yoneda Lemma and it's NONSENSE to think that a monomorphism might not be injective!!! Trash category theory go home!!!!
>>
Archie Cenderhood - Tue, 07 Mar 2017 10:03:55 EST ID:+wJbtIkG No.15416 Ignore Report Quick Reply
>>15415
Have fun remembering fifteen different definitions of some uiversal construction which are all actually the same thing in different categories. Do you enjoy clogging your brain with extraneous nomenclature? (Please, no jokes that this is all that math is.)
>>
Priscilla Brellydale - Tue, 14 Mar 2017 16:56:33 EST ID:0IIhzQOQ No.15417 Ignore Report Quick Reply
So what do you guys think about Hodge theory?
Is the hype over?
>>
Shitting Huddlehan - Thu, 16 Mar 2017 14:35:45 EST ID:vrOFV9fT No.15421 Ignore Report Quick Reply
>>15417

Homology is bullshit, cohomology is bullshit. The only reason people care about that stuff nowadays is for some data analysis purposes, so that means people are interested in actually computing homology groups of spaces rather than this deeper stuff. The only people that care are topology nerds.


Connection between graphs and differential equations by Jarvis Pessledale - Tue, 14 Mar 2017 17:17:53 EST ID:ueMHQ1BO No.15418 Ignore Report Reply Quick Reply
File: 1489526273324.jpg -(103964B / 101.53KB, 1024x768) Thumbnail displayed, click image for full size. 103964
YO WUT IS UP!?
I am curious if anyone knows how to represent differential equations as a graph? I acknowledge that that sounds absurd, but I am curious, I know you can represent a graph via tutte polynomial, so I figured it's not too much of a stretch.
>>
Doris Billingforth - Tue, 14 Mar 2017 17:56:07 EST ID:zpTgkQCY No.15420 Ignore Report Quick Reply
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What do you want exactly? It's not absurd to ask for something as a graph since graphs, like most kinds of mathematical structures, are expressive enough to encode anything you want to do.

A given differential equation will give rise to a dynamical system right? Like if I give you a point the differential equation can tell me the derivative(s) at that point. These derivatives are instantaneous rates of change, but you can imagine for each point in your space following the corresponding tangent vector for a certain time t. If your space is over the reals you will obtain an uncountable family of uncountably infinite combinatorial graphs which vary with t. Maybe you can study the corresponding operators? It looks like the sequence tends to the identity but the way it changes might encode information about your solutions.


Restricted movement by Ian Cinderworth - Sun, 26 Feb 2017 18:58:58 EST ID:ncb8UBjg No.15412 Ignore Report Reply Quick Reply
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I like to ask here, because it's chill here and I the thought of citing /math/ on my bachelor's amuses me.

Pic illustrates a truck with a trailer, reversing in a clockwise circle. The axles are illustrated with a green wheel on the end of each radius.
The axle on the trailer can be steered.
Suppose the wheels on the trailer are turned slightly, creating a new radius and triangle shown in blue.
So after the truck has reversed for a bit, shown in pink, I think the trailer would move like shown, with the triangle intact, dragging it's point C along the "old" radius of the truck rear axle. (Old being the instance where the new angle of the trailer wheels were established)
My questions are: Do I reason correctly? and How does the angle B in the yellow triangle change, according to the trailer wheel angle, the trucks turning circle and distance traveled? You see, I'm interested in the point where yellow A an B are equal.


What do you guys think about this equation?? by equation - Thu, 16 Feb 2017 21:56:31 EST ID:3CQShUbt No.15337 Ignore Report Reply Quick Reply
File: 1487300191718.jpg -(376323B / 367.50KB, 2048x1536) Thumbnail displayed, click image for full size. 376323
DICKS EVERYWHERE
>>
Esther Dribbleforth - Fri, 17 Feb 2017 23:12:09 EST ID:A2j/BW/W No.15338 Ignore Report Quick Reply
>x = 0.0777...
>jk, x is infinity

Anyway, you fucked up the very first line. Should be 0.777... = 10x. From there, you can break up the lhs to get 0.7 + x = 10x. Subtract x from both sides: .7 = 9x. Divide by 9: x = 0.7/9 = 7/90. So 0.0777... = 7/90.
>>
Beatrice Crenningmock - Sun, 19 Feb 2017 01:54:24 EST ID:A2j/BW/W No.15339 Ignore Report Quick Reply
>>15338
And by "you" I mean whoever wrote that troll proof. I was under the impression it was your doing at first, but now I see you're just asking about it.

In that case, and looking at this with fresh eyes, I see that whoever wrote this is confusing (purposefully?) things like 0.7x with 0.7 + x.

0.7x = (7/10)(7/90) = (7*7)/(10*90) = 48/900 =

Whereas, 0.7 + x = 0.7 + 0.0777... = 0.777...

Or, 0.7 + x = 7/10 + 7/90 = 63/90 + 7/90 = 70/90 = 7/9

This confusing of addition with multiplication is the main theme of the "proof". The only things done correctly here are multiplying or dividing equations through by ten and the realization that a number subtracted from itself is zero (the number doesn't need to be infinity for this to work as is stated in the "proof").
>>
Sidney Hummerwedge - Tue, 21 Feb 2017 00:04:06 EST ID:vrOFV9fT No.15340 Ignore Report Quick Reply
>>15337

If you want to deal with things like 0.777 repeating it's best to use a symbol like a, rather than those fucking dots. Everything went wrong after the part in the rectangle in the attached image.
>>
Fucking Grandville - Wed, 22 Feb 2017 00:08:02 EST ID:A2j/BW/W No.15343 Ignore Report Quick Reply
>>15340
English use those dots instead of the vinculum. Chinese do too.


hex calc by CVF - Sun, 12 Feb 2017 00:53:25 EST ID:zOfzUnva No.15334 Ignore Report Reply Quick Reply
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good calculator that does hexadecimal? for school?
binary is a plus +
>>
Basil Sinnerdedging - Mon, 13 Feb 2017 19:38:14 EST ID:A2j/BW/W No.15335 Ignore Report Quick Reply
https://www.amazon.com/Texas-Instruments-Engineering-Scientific-Calculator/dp/B004NBZB2Y
>>
Sophie Nennerstet - Mon, 13 Feb 2017 22:35:57 EST ID:ogPDtdlS No.15336 Ignore Report Quick Reply
If it's for a class use what they tell you. Otherwise use a smartphone, laptop, etc. It is what computers were originally made for, after all.


Calc by Hugh Jass - Tue, 31 Jan 2017 08:38:40 EST ID:Rhgh4/nK No.15328 Ignore Report Reply Quick Reply
File: 1485869920510.jpg -(10870B / 10.62KB, 489x93) Thumbnail displayed, click image for full size. 10870
  1. How do I set this problem up?
  2. Do I square the radical term to get rid of it?

The way my prof. writes these problems in a straight line is confusing. Thanks
>>
Basil Gubberway - Tue, 31 Jan 2017 11:54:02 EST ID:A2j/BW/W No.15329 Ignore Report Quick Reply
This is simplification using order of operations, not calculus.

[1/sqrt{1/(9x)}/(2[x^0.5]y)^-1]^-4

[1/(sqrt{1}/sqrt{9x})/(2sqrt{x}y)^-1]^-4

[1/(1/[3sqrt{x}])/(2sqrt{x}y)^-1]^-4

[3sqrt{x}/(2sqrt{x}y)^-1]^-4

[3sqrt{x}*2sqrt{x}y]^-4

[6xy]^-4

1/(1296x^4y^4)
Comment too long. Click here to view the full text.


Can someone help me? by Samuel Gagglechick - Sun, 08 Jan 2017 06:01:19 EST ID:QDezsc5/ No.15313 Ignore Report Reply Quick Reply
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Anyone?
>>
Jenny Tootbury - Sun, 08 Jan 2017 13:11:54 EST ID:a1cMDxo8 No.15314 Ignore Report Quick Reply
In general, you should make a sketch of the situation with all line segments and angles included, write those down and think about which of them you can calculate directly from what you're given, as well as your intermediate results.

In the present case, you know the lengths of all sides of the triangles PQR and PQX., and you want to calculate XR. What are some angles you can calculate? Is XR part of any interesting triangles, and is it possible to calculate some of the sides and angles in those triangles?
>>
Cornelius Nittingpidge - Mon, 09 Jan 2017 06:00:40 EST ID:TYRFlDNG No.15317 Ignore Report Quick Reply
1483959640448.jpg -(18924B / 18.48KB, 320x320) Thumbnail displayed, click image for full size.
it's far bro
stay home
>>
Charlotte Ficklepen - Wed, 11 Jan 2017 15:34:25 EST ID:A2j/BW/W No.15320 Ignore Report Quick Reply
Call angle QPX a and angle XPR b. Then you can use the law of cosines (LOC) to determine both a and a+b. Then subtract to get b. Then use LOC to find the length of XR using b. Sorry for the late reply.
>>
Shitting Drussleford - Tue, 17 Jan 2017 19:32:16 EST ID:cHNY4zfv No.15325 Ignore Report Quick Reply
i know this shit seems retarded when you just doin geometry but try to really grasp the concepts cuz advanced math takes this triangle shit and makes some whole other crazy shit happen with circles till you got calc and beyond, all based on triangles, thats why pythagoras was a real OG nigga


Combine Data Sets Values Something by Doris Bemmlebanks - Mon, 02 Jan 2017 13:27:30 EST ID:RbgW2Zpy No.15304 Ignore Report Reply Quick Reply
File: 1483381650547.jpg -(51347B / 50.14KB, 156x518) Thumbnail displayed, click image for full size. 51347
Suppose youve got 2 data sets but they're in completely different units and not on the same scale. What operation could you apply to each row in order to get an idea of their combined result.
Sum? Average? Multiply?
2 posts omitted. Click Reply to view.
>>
Nigel Hibblefutch - Fri, 06 Jan 2017 13:41:45 EST ID:tgwdoW8d No.15310 Ignore Report Quick Reply
>>15309
Nah I just want to build a "score" from a bunch of different columns like this.

Maybe if you looked at the percentile of each row and averaged that.
>>
Reuben Bunford - Sat, 07 Jan 2017 04:28:59 EST ID:tgwdoW8d No.15311 Ignore Report Quick Reply
I figured it out!
Calculated the percentile rank of each row relative to its column, then averaged all the ranks across! Fuck yeah!
>>
break-a-bond !!D0XjIgKF - Sat, 07 Jan 2017 23:56:11 EST ID:tgwdoW8d No.15312 Ignore Report Quick Reply
>>15311
However!
This does not take into account weighting of each item if that matters at all.
So the forumula would become tedious
0.2*percentile1 + 0.8*percentile2
Then if you change that weighting from 20% -> 30% you're going to have to change every other weighting to add up to 1.
>>
Eugene Gubberfuck - Sun, 08 Jan 2017 18:08:26 EST ID:/4S1D94J No.15316 Ignore Report Quick Reply
>>15310
You cant build a score without context to what the data represents
>>
Edwin Semmlebury - Sun, 22 Jan 2017 22:28:09 EST ID:C8IBIGCT No.15327 Ignore Report Quick Reply
>>15316
Well he just did!
deal wit it


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