Would the world be better off if ruled by mathematicians rather than the current political elite?
no
case in point:
https://terrytao.wordpress.com/2016/06/04/it-ought-to-be-common-knowledge-that-donald-trump-is-not-fit-for-the-presidency-of-the-united-states-of-america/
>>8520163
There's a certain skill to being a politician that isn't necessarily held by mathematicians
Also, running a government isn't similar to a math equation ( or a business for that matter )
>>8520168
Why can't you turds just stop? He's won, that's it, stop bitching, you AREN'T going to change it. Besides, changing it WOULD cause a civil war. It happened, it goes to continue to happen, get the fuck over it.
how would I go about solving this matrix equation with a non-square matrix?
I can't find the inverse obviously so I can't just do X = A^-1 B
>>8519805
Write matrix X with some arbitrary coefficients, then multiply the matrices on the left side and solve the system of equations
First X must be a 2x3 matrix
3a+2d = 3
4a + 3d = 1
1a +0d = 7 => a= 7
...
keep solving from there.
>>8519805
you might try
A x = B
A^t A x = A^t B
x = (A^t A)^(-1) A^t B
If there is an x that works, this will give it to you. You have to check that it works though.
What does /sci/ know about rubber? Chemically speaking.
bouncy
stretchy
waterproof
good insulator of electricity and heat
>>8519637
There are tons of different rubbers from natural to synthetic to EPDM and sulphonated and fluoronated
Rubber is usually measure in thing s like tack, adhesion, hysteresis, g' and g". Rpa and mdr
>>8519674
Even silicon based rubbers are useful, they lack strength but are resistant to heat aging
Hello friends. I am writing a little paper on applied probability, and so far I've studied the rigorous construction of the Brownian motion and the proof of its properties, the construction of the stochastic integral, and an explanation of adapted processes.
I think I've build up a decent toolbox now to apply it to "real world problems", and I was wondering if there is something small I could research in this field.
One of my ideas was to look at the Black-Scholes model in relation to recent events (Brexit, Trump election) and whether it works or not, and ways to hedge against these situations. Something else I was thinking about was doing something with the 2008 financial crisis.
Any other good ideas?
I'd think extreme events (Brexit, Trump election) are the influences most far away from the peaceful world of textbook entry level stochastic processes.
I think I recently saw a site with real world example data for statisticans to work with. Google?
>>8519431
>I think I recently saw a site with real world example data for statisticans to work with. Google?
I'm not following this one. I can get all the data I need from yahoo finance.
>>8519431
Trump wasn't an extreme event. Very low prob of 3 term democrat.
Say you have the equation x^2 + 6x + 9 = 0. Couldn't (x + 1) and ((x^2 + 6x + 9)/(x + 1)) technically be considered factors, so why doesn't it work to set each factor to zero and solve from there?
>>8523190
What is this even supposed to accomplish?
You still have the exact same quadratic to solve (in the numerator) you just tacked on some useless terms that cancel to 1 for no reason
You would create a discontinuity at x = -1, so it wouldn't be the same function.
>>8523190
x^2 + 6x + 9 = (x+1)((x^2 + 6x + 9)/(x + 1)), for all x != -1.
Thus if 0 = x^2 + 6x + 9 shares solutions with
0 = (x+1)((x^2 + 6x + 9)/(x + 1)) when x != -1.
Science proves jailbait is the best.
define 'reproductive value'
>>8523191
value=i like it
>>8523191
Reproductive value (RV) is basically a measure of the amount of offspring a female of a given age can be expected to have over the remainder of her life. By mathematical definition this rises with age up to the beginning of a female's reproductive lifespan, as the probability of her dying before she starts reproducing decreases, and then goes into decline as she uses up her fertile years.
The values in the graph were taken from Amazonian populations which make fairly good models of prehistoric people. In these populations the average age of a girl's first pregnancy is about 17 which explains why the graph line peaks there. The best age for a man to acquire a girl as a wife would be just before that as she approaches the beginning of her reproductive lifespan. Obviously a man needs to acquire a girl before the peak and not after it when she's already started reproducing with another man in the tribe.
Maybe this is the reason girls grow eye-catching perky boobs at this age. They signal that she's approaching reproductive age.
how hard is to study two degrees at the same time?
very
>>8523100
why
depends entirely on the degrees
if you go into uni like I did already having a firm grasp on your major, then you don't really gave to go to any classes besides the general education ones that you need for every degree
and in that case, you could do a second degree simultaneously and focus all of your attention on it
REV UP THOSE ROCKET BOOSTERS
>http://www.ulalaunch.com/webcast.aspx
IT'S LAUNCH DAY MOTHERFUCKERS
Why do I love ULA so much? It's pretty simple when I think about it. ULA isn't just the best launch provider in the country; they might just be the greatest launch provider of all time. Just imaging the Altas V riding through the skies of Earth, the wind on its fairing, the mighty RD-180 below it. As she rides through the red sky, NASA swoons at her very scent. They know how she smells; the essence of burning RP-1 smell is sold in Orlando under the name of "Space Orgasm." The very nature of ULA is mystery. Could they be playing a deeper game than even Tory Bruno realizes? The answer is yes, ULA has transcended such boundaries as the physical world, and has free will to do whatever they sees fit. However, ULA is filled with such guile, such arcane craft that they does not even use these powers. Why, you might ask? You will never know, for the mind of the ULA is not one that is easily penetrated. ULA rockets are such a force of nature in this realm that nothing can truly touch them, the only thing keeping them bound to this world at all is their will to exist within the preordained boundaries understood physics. ULA is not only beyond the comprehension of us, it exists within a plane of true focus and beauty. Observe the plume of exhaust gasses from this Delta IV, the gorgeous and rippling flames, the gallant fairing, and most importantly, its engines. Her engines, like cauldrons straight from hell, provide the only glimpse into the true machinations of ULA. Do not stare into them. Many good men have gone mad in the attempt. ULA is not just a launch provider, a formless collection of engineers and rockets; they are themselves the binding that holds the word together. Without ULA, Musk the Menace takes over and the entire space industry as we know it crumbles. The Mississippi would stop flowing without ULA, Kessler syndrome would take over in orbit, and the space station would fall without their fiery gaze. These are just of a few of the reasons why I like ULA so much.
>>8522968
>that image
why? Irony?
>>8522982
Better than a toothbrush
>pic related, a ULA launch vehicle
How do you solve this
>>8522758
is m(AE) the length of the line segment AE?
if so, its 10
Did the (pre-classical) ancients REALLY believe that the earth was sitting on the back of a giant turtle, or was it some sort of mystical allegory or something?
>>8522677
https://en.wikipedia.org/wiki/World_Turtle
>>8522677
Sounds like a /his/ question desu.
They literally didn't think about it beyond the turtle
so yes, they really did believe it. Anyone who didn't believe it either kept their questioning to themselves, or was no longer part of that society.
Hey /sci/.
What are the physical properties that determine whether or not a photon will be reflected, absorbed or ignored when directed at an object of mass?
Also, there are mirrors for photons from the visible part of spectrum. Can there be mirrors for gamma rays, or thermal waves?
>inb4 this guy
>>8522388
Is this a typical homework question, since there are no answers?
This was never mentioned in my courses.
>>8522388
why can't you just google it?
yes, it's a standard homework problem, it's just that nobody cares about you
there is a stupid question thread, people will answer it in there
Clearly, proof by induction is the most advanced way of proving things in math.
>>8522289
kys cs major
>>8522293
>ad hominem
Meanwhile, in CS we are writing AI to replace pure math. Enjoy your non-existent careers.
>>8522400
The AI that replaces pure mathematicians will not be written by CS majors. It will be written by AI that researches AI and has replaced those CS majors.
Hey /sci/ before you start shitting on me, just hear me out. So in general, I know I am intelligent but over the past 2 years or so I have noticed that my perception is enhanced in a way. Not that I have an enhanced eyesight or hearing but rather I just notice things without really thinking about it. These things usually stick with me and I can almost immediately predict certain things about people which later turn out to be true. Has anyone else noticed this? Asking this board because this is definitely the highest concentration of intelligence on this site.
>>8521059
nope, you're not intelligent
everyone else notices the things you do, just never say anything about it because it's normal
also, not science or math related, so fuck off
>>8521059
That's a sign of autism. Lay off the drinking water, vaccines, air, and food.
Do you guys ever feel like its weird that we are animals living out our natural life cycle?
science =/= philosophy
>>8520686
In the same sense it's weird that a fire burns out, sure dummy
>>8520686
>do you guys ever find it weird that 1 assaulted by 3 becomes 4?
No, I don't
Which philosophers does /sci/ approve of?
Adam Lanza
>>8520679
Various themes in the aesthetics of nature, such as appreciation grounded in the idea of the picturesque, have been criticized in a number of ways: as anthropocentric (Godlovitch 1994), scenery-obsessed (Saito 1998a), trivial (Callicott 1994), subjective (Thompson 1995), and/or morally vacuous (Andrews 1998)