Archived threads in /sci/ - Science & Math - 358. page
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So, I saw this graph of 10 vertices. I then thought to myself "Huh, no matter how you arrange these 10 vertex there will always be at least one place where two edges cross".
But this thought has now been bothering me all day. My issue being I am pretty damn certain this is true but have no way to write a formal math proof. So how could I go about doing that so I can turn my hand waving intuitive nonsense into something more substantial.
https://en.wikipedia.org/wiki/Planar_graph
You can find ways to prove this in this article.
>>7850301
Me again.
use Kuratowski's Theorem.
" The graph G is planar if and only if it does not contain a Kuratowski subgraph."
So the simplest way would be to find a kuratowski subgraph inside the graph.
A complete K5 och K3 graph is a such a graph.
The proof of the theorem can be find on the net.
>>7850291
You'll need topology. Graph theory stops just short of being able to say things about the structure of a given graph. As far as I know, anyway.
Burned myself picking up a hot crucible lid with my fingers flirtng to a hot girl instead of paying attention today.
Anyone else have any lab mistake stories
i remember my first lab mistake
>microbiology lab, dont know anyone
>see short cute nerdy blonde girl
>make sure shes my partner
>she's pretty cool, plays LoL and watches my little pony though, would still hit it
>turns out shes engaged, w/e i have a girlfriend too
>friends on and off next 2 years
>one day we go to the park off campus and get drunk...
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>>7850257
I guess you could say that girl was... scalding hot
>yeaaaaa
>>7850257
You taking quant op
https://d2.maxfile.ro/iuocjtewtz.txt
Here's my full genome, faggots. Do your worst, if science is so powerful. Oh, you can't do anything with this? You don't even know what it means? Wow, what a powerful belief system.
t. /lit/
Yep, according to that you're most definitely a faggot OP
>>7850021
According to some genes on your 3rd 21 chromosome, I see you have a high predisposition for homosexuality.
>>7850021
Tell that to the clone I form from synthesizing a fertilized egg with your genome, teach to be megahitler, and train in ninja arts so he can take your place and steal yo gurl
https://www.youtube.com/watch?v=-_6AkYW6Kg4
Why didn't any of you supposed geniuses think of this? Do you seriously think it's enough to be an A+ exam baby your whole life without having these kinds of breakthrough ideas?
This basic idea is very common... I own one I bought at a local store for 30 dollars. so how is this breakthrough....
>>7849947
>with onboard optical and thermal imaging you can see everything
>plays a game of Packman, where the drone is Packman and the victims are ghosts
>>7849958
>so how is this breakthrough....
You forgot the le helping le people maymay(read:marketing ploy)
Math major here. What makes my bachelors in math equal, or at least worth the same as any other math undergrad around the nation (USA)? I mean does it even matter the courses that I am taking? Do people that want me for their job give 2 shits about my degree, or that’s just fucking lies? I want to work somewhere that involves applied math or at least at a bank. For example here a list of math courses I taken so far:
Probability (not statistics each course is separate, junior course)
Intro to PDE (junior course)
ODE (junior course)
Abstract Algebra (junior course)...
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Go get your MBA and get a job as a banker. I hope you know some shit about finance
>>7849796
>I mean does it even matter the courses that I am taking
Absolutely, what separates a good degree from a bad degree (even from the same school) is the course selection.
>What makes my bachelors in math equal, or at least worth the same as any other math undergrad around the nation (USA)?
At the bare minimum a math major should take
1 semester of theoretical linear algebra at the level of Shilov/Hoffman&Kunze
2 semesters of...
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You just gotta prove you are smart and know your shit ( whatever that is you wanna do ), your degree helps with that.
Can meme evolution be studied by network topology or graph theory? Is anyone working on this already, I tried google scholar and UIUCs library, but wasn't sure what search terms to use or what fields to look in.
Also graph theory love/hate general
>>7849789
Not yet. I think that by now we've gotten the biology tards to learn calculus I in their degrees.
Just give it a couple of hundred years and they will discover a graph theory book on their own.
>>7849789
Yeah, you can model anything with graph theory. The interesting part is what you do with the data after you have structured it as a graph.
>literally writing a meme thesis
Hey /sci/, is there any way to pull electricity from a rubber coated electricity-carrying wire without splicing into it?
>>7849786
Magnets.
>>7849786
Depends on if it's AC or not
>>7849792
From an overhead power line, which I believe is AC.
>attempting a proof of an open problem
>create a hypothesis based on existing evidence
>devise and execute a method of repeatable experimentation to test hypothesis under different circumstances
>an "elegant pattern" emerges
not sure quite how to phrase my question. Are there false positives for elegance in mathematics that indicate the /sci/entist is suffering pareiodelia (thing where you see jesus in toast/see what you want to see) or is an elegant result mean that you are "right" and were able to successfully test your hypothesis/were right about your hypothesis ?
how can you confirm this on your own before sharing it with someone ?
>"proving" something with a hypothesis
this is math, get out of here with your empirical evidence bullshit. And yes there are things in math which everyone believes to be true based on the fact that it has been true in every case, but still hasn't been proven. Look up the Rieman Hypothesis.
>>7849739
Well, just because you see a pattern doesn't prove anything. You have to mathematically prove that this pattern holds, like for example saying the Euler Mascheroni constant is irrational based on the premise that there is no pattern would never be accepted, so the reverse shouldn't either. However, there is nothing wrong with contributing to the solution by saying you've noticed a pattern and others should look into it if you can't actually prove the existence of a rule mathematically on your own....
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>>7849766
it makes sense. assume this is a mathematical pattern that describes a process in a less pure branch of science and the magnitude of the rate of change in the pattern is the important part of it. however when reduced to a sequence it is very simple, that is the entire sequence can be accurately predicted and easily verified from the first 2 terms.
your post is very helpful. How do you go from asserting a pattern to defining a mathematical rule based on that pattern ? what makes a would be /sci/entist either...
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Is this man a genius or a charlatan?
who the fuck cares? why are there so many threads asking if guy X is a genius? there are geniuses, and there are idiots, and then there's you. are you a genius? if not, why? what are you doing right now to justify not being smart enough to be a genius? why aren't you making strides in your field? because you had to shitpost on /sci/? fuck off, go open a path for discovery instead of fantasizing that someone else is or isn't.
>>7849737
t. an idiot
>>7849737
Take your meds
![mnist_train3[1].jpg](https://i.imgur.com/dXmbDyo.jpg "mnist_train3[1].jpg")
What would change if we added another number to how we count?
For example, another number would go between nine and ten, then we'd have numbers like this
> 1 2 3 4 5 6 7 8 9 x 10
> 11 12 13 14 15 16 17 18 19 1x 20
Is there a reason we have as many digits as we do per ten?
>>7849712
https://simple.wikipedia.org/wiki/Base_(mathematics)
>>7849712
10 fingers 10 toes nigga. Base 10.
>>7849745
Base ten is 0-9. When you count something on your fingers, do you go "0, 1, 2" for the first three fingers? Didn't think so, retard.
If you want to make an immediate difference then why don't you get involved in UAV research? I have and twice already I've worked on concepts that after searching Google for originality I could only find it in some guy's PhD thesis done only a few years ago. Not only that but my research always came to the same conclusion as theirs meaning my methods were valid. After the initial euphoria at believing myself to be a super genius I realized that it's really because the field is a) new and b) small-scale meaning that I can do the same thing at home that guys...
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>>7849675
I agree. Much can be learned and figured out in the first decades of a new technology. Breakthroughs happen so fast that they often happen in many places at the same time. There's actually a plane that uses some of the methods you are talking about. It essentially has 2 loops, one on each side of the plane where normal wings are usually. It makes it much more compact. That one is better than the full loop across the entire plane because it helps eliminate vortex drag.
https://youtu.be/GcDIXDRBJis
https://en.wikipedia.org/wiki/Closed_wing
You...
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I'm sorry in what way is UAV lift any different than AV lift?
>what two PhDs
Link their dissertations and show your own work.
>contrarianism on this board and the persistent claim that amateurs can't make any useful contribution to technology
Make a contribution then. You know who has made a contribution? Picture related and their 24 billion dollar budget. But I'm sure they've missed something you can rig up in your garage with hobby store parts. Waiting with baited breath to see it.
You are a poor communicator and even if your 'ideas' materialize in a testable reproducible product, your personal limitations with hamper the planning, seed and growth cycle of a business.
Why do I make this bold assertion? You have written 346 words and have failed to explain some basic things.
>>>>>>
I am a private individual researching Aeronautical Engineering, located in the US. I have a background in BACKGROUND. My main interests of focus are:
>Circular Wing Lift
Using the Coandă effect
<provide relevant links<
>Electric personal hovering devices
SHOW HOW
<insert relevant videos<
Here are links to two PhD dissertations which substantiate some of my experimental work:
<provide relevant links<
>>7849675
>hobby store and start experimenting.
Yeah, except the part where it's illegal to own a unlicensed drone. And then there is the patent trolls, who copyright the most vague shit and sue everyone into oblivion.
I guess countries like China will always be more willing to accept innovators and inventors.
Has anyone actually truly feared existence? What do I mean by this? Well here's what I mean: have you ever thought deeply enough to understand that existence in ANY FORM is scary? It's scary mainly because it's unexplainable and will never be explained. I'm wondering if you guys have ever thought this before as most other people havent (they're atheist or theist and believe in some form of physics or story that explains how the universe exists). I am personally agnostic which is technically atheist but as to how everything exists, I don't have any...
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>>7849546
It's called an existential crisis fuckwit. We all have them when we're 15.
You aren't special.
>>7849569
1. Not 15.
2. I'm not saying I am special.
3. Every time I try to start a thread like this you assholes come in and say this shit.
>>7849546
It doesn't make you anymore intelligent. It literally just means that you're wasting your time with unanswerable questions.
Is the universe infinite?
http://www.esa.int/Our_Activities/Space_Science/Is_the_Universe_finite_or_infinite_An_interview_with_Joseph_Silk
No.
>>7849515
Why do you think so?
![saddle[1].jpg](https://i.imgur.com/5RtSVhY.jpg "saddle[1].jpg")
>>7849517
they did some light lensing tests on distant stars and found the universe is saddle shaped
/r9k/ here
what does science say about laziness?
is it hormones? genetics? tell me about it.
Laziness is a result of being highly intelligent. You realize that all human effort is ultimately pointless and irrelevant compared to the vastness of the cosmos, and thus do not see anything worth putting effort towards
>>7849513
Dumb frogposter
>>7849513
> /r9k/
Hows chad these days?
Ok, so because of some timetable fuckery, I can only choose from two papers to add to my first semester of a physics major. This paper can be in classics, or in philosophy. So which one of these is ultimately more useless, and which one is ultimately more brain-numbing and uninteresting? Like to hear your thoughts.
>>7849418
You are in Auckland?
>>7849418
Neither you dumbfuck. The only thing useless is your brain. Both fields will teach you how to think and view the world inquisitively. However, if you must choose one, I would go with classics.
