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>wavelength function gives,say, an electron a probability to be in a space range.
Does that mean that, even if we don't know, they do have a fixed location? Or is it wrong to assume they do have a position since they can also be considered a wave(wtf does that even mean)
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How about you learn the math first before you look for an interpretation?
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Let's say hypothetically we somehow managed to invent interstellar travel within the next decade, and then confirmed the location of extraterrestrial intelligence.
Then, when we got to their planet, excited to finally meet another intelligent species, we discover that they are primitive and are in what we'd call the bronze age.
Would you be disappointed?
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>>7809421
No, it would be one of the most amazing scientific discoveries of all time. If you've been to one post-singularity world, you've been to all of them. It's the historically lost ages that really matter.
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>>7809421
Why do the fuck. And I mean WHY THE FUCK would we even bother?
Woohoo, we found it, now could we please spend the money in shit like matters. Like giving more funding to the pure mathematics department?
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So I've got a circuit exam tomorrow, and the only kind of exercises I'm having trouble solving are RL or RC circuits with an impulse source.
Pic is an example, where Rb=10kohms, r_pi=1kohms,g_m=0.1S, Rs=Re=Rl=1kOhms and Vs=δ(t). I need to fine the Vc(t) function of the voltage across the capacitor without using the laplace domain, and I'm drawing a blank
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Wsr already redirected me here, so I really need this
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>>7809413
you game 2 right place made :D D D
have his pigture :D D :D
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>>7809412
Why would any label have to be Pi
Also what is S?
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Anybody else find that most professors are actually really mediocre people?
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1) how so?
2) what else would they be?
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In my riding group there's one university professor. I was going to disagree and say that a biker professor is not mediocre at all but then I realised that he rides a Yamaha XJ600 which is one of the more boring bikes out there
So yeah, can't disagree
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>>7809232
Duh. The true geniuses of the world are the Li Wangs of the world who are hiding deep within bum fuck nowhere, doing nothing with their lives. I have never met anybody smarter than me, and will most likely never meet anybody smarter than me. Despite my abundance of intelligence, I remain a nobody. Why? Because I am intelligent enough to not give a single fuck about my image. I am intelligent enough to know that putting myself through pain for years on end just to build an image in other brains, brains that will one day cease to exist, is plain f-u-c-k-i-n-g ridiculous.
>Oh, b-but he can read textbooks all day and memorize things well!!11 The professor must be smart!1
Typical STEMtard falling for retarded "science = intelligence" stereotypes / memes.
Anonymous
Natural deduction and predicate logic. 2016-01-25 08:50:49 Post No.7809225
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Natural deduction and predicate logic. 2016-01-25 08:50:49 Post No.7809225
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Natural deduction and predicate logic.
Anonymous
2016-01-25 08:50:49
Post No. 7809225
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Hi ,
Can somebody tell me if line 10 is correct ? Did I do a mistake?
∀x(A ∨ B) ⊢ ∀x A∨B , Note: x is not free in B .
1.∀x(A∨B) premise
2.¬(∀A∨B) assumption
3.x0
4.(A∨B) [x/x0] (∀xe),1
5.A[x/x0] ∨ B x is not free in B
6.B Assumption
7.∀x A ∨ B (Vi),6
8.⊥ (¬e) 2,7
9.A[x/x0] (⊥e),8
10.∀xA (∀x)i,3-9
11.∀A∨B (vi),10
12.⊥ (¬e) 2 , 11
13.¬¬(∀A∨B) (¬i),2-12
14.∀A∨B (¬¬e) ,13
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>>7809225
What book are you using? I've only worked with propositional logic in Fitch style deduction systems, not predicate logic.
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What the fuck is that shit, can't you write trees ? That proof should be trivial and I have no idea what's going on.
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Line 9 is wrong, you just proved not(B), you cannot use bottom-elim to conclude whatever
Anonymous
Is this a good resource /sci/? 2016-01-25 08:26:46 Post No.7809183
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Is this a good resource /sci/? 2016-01-25 08:26:46 Post No.7809183
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Is this a good resource /sci/?
Anonymous
2016-01-25 08:26:46
Post No. 7809183
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Hey /sci/ I'll cut right to the chase. I was interested in teaching myself mathematics as a hobby, and am starting with single variable Calculus. MIT OCW offers text+videos to teach this, along with problem sets and a final "exam".
I was just asking if /sci/ deems this a reliable resource? I assumed so since it's MIT but would like a confirmation.
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as good as any other resource of this type you could find
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>>7809183
Videos might help you at the start if you are really struggling to grasp a concept, but you need to git gud at reading textbooks as fast as possible.
The more you study the better you become at studying which means you can work through textbooks faster and faster, videos don't have the same effect because watching a video is passive learning and you can't control the pacing; video is a slow, shitty meadia compared to text.
http://4chan-science.wikia.com/wiki/Mathematics
http://4chan-science.wikia.com/wiki/Math_Textbook_Recommendations
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>the speed of light has a speed limit because the so called zero point energy that results in the "vacuum catastrophe" in QFT is actually the MEDIUM which controls the speed of light
>Nullify the zero point energy field and you have FTL
Your welcome /sci/.
Don't forgot to quote me when one of you win the Nobel Prize a few decades from now.
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Yeah sure. I'll just greentext you in my acceptance speech.
Thanks for doing my homework, nerd. Edison out.
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Speed of light is only so because it also happens to be the speed of causality. Moron. Actually speed of light is infinite but it can't go faster than causality so boom speed limit.
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>>7809316
>first they ignore you
>then they laugh at you
>then they fight you
>and then you win
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case 1)
f = f(x,y,z) where we know that x,y,z are INDEPENDENT of each other
- the total derivative:
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} \frac {dx} {dx} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} (1) + \frac {\partial f} {\partial y} (0) + \frac {\partial f} {\partial z} (0)[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x}[/math]
- the partial:
[math]\frac {\partial f} {\partial x} = \frac {\partial f} {\partial x}[/math]
case 2)
f = f(x,y,z) where we know that x,y,z are DEPENDENT on x
- the total derivative:
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} \frac {dx} {dx} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} (1) + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
[math]\frac {df} {dx} = \frac {\partial f} {\partial x} + \frac {\partial f} {\partial y} \frac {dy} {dx} + \frac {\partial f} {\partial z} \frac {dz} {dx}[/math]
- the partial:
[math]\frac {\partial f} {\partial x} = \frac {\partial f} {\partial x} + \frac {\partial f} {\partial y} \frac {\partial y} {\partial x} + \frac {\partial f} {\partial z} \frac {\partial z} {\partial x}[/math]
mfw partials and totals are same and mathfags just like to jerk themselves off with different notations
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>mfw sci doesnt reply to anything that doesnt have
.9999999 = 1???
earth is flat faggots
meme musk rockets
le fucking ai doom bots
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>>7809153
What the fuck are you doing? The total derivative is as you wrote it. The partial derivative does derivation assuming the other variables constant.
That is \frac{\partial f}{\partial x} = \frac{\partial f}{\partial x} on both occasions.
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>>7809337
Apparently I must do something more for latex output to appear.
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How would one implicitly solve this by separation of variables? I can't seem to figure out how to separate the x's/dx's and the y's/dy's.
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You don't necessarily have to separate them. Try integrating this and find an expression for y, if possible.
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>>7809072
(y+1)/(y-1) dy = (x+3)/(x-2) dx
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>>7809072
Can someone just go and stop all internet-facing AI from rearranging history to write confusing text books such that archetypal reasoning problems get posted on this board? Thanks.
What is the best topic in maths and why is it Geometry?
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>>7809024
>why is it Geometry?
b/c you can use it to describe all 4 forces in physics
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>>7809024
Don't you mean Set Theory?
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Sacred Geometry
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>50-100 years in the future
>we interstellar flight now
>visit the planet best candidate for life
>land and greeted by ayy lmao
>intelligent and civilized
>they have their own wars but peaceful
>soon allowed to see their internet
>their artists are drawing rule 34 of us
Trying to describe the opposite thing, what would happen if aliens visited us.
Porn would be drawn and made but would the government try to hide it from the visitors, among a lot of other stuff?
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>>7809008
>50-100 years
>interstellar flight
Good one, OP.
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>>7809008
>what would happen if aliens visited us.
The thing is, if FTL travel(for you need FTL to travel to distant worlds) is possible, then why haven't they visited us already? Are there perhaps no aliens at all, and there is only life on Earth? Unlikely, I would say, for universe is far too big a place. Do you think, that if they exists, they haven't developed interstellar travel yet? Also, unlikely, because life could have developed far earlier that us. Or maybe, life usually destroys itself, somehow, before they have a change to venture into interstellar space? No idea, I'll leave that to the more pessimistic of the lot.
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>>7809426
>if FTL travel(for you need FTL to travel to distant worlds) is possible, then why haven't they visited us already?
Because the universe is an incomprehensibly big place, and we are but one tiny insignificant planet amongst trillions of trillions of trillions.
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>tfw struggling through basic ochem
JUST
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>>7808633
It's 99% memorization.
Work harder.
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>>7808633
Don't fall behind. It's going to get worse. Get a tutor early. Your university should have a tutor program paid for by tuition.
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>>7808633
Previous posters are right, Its mostly memorisation. Make more notes, do a as many questions as you can and don't be afraid of asking your tutors/teachers/lecturers or even friends for help. Good luck.
Help me create a polynomial function with this given information:
Zeros: -3, multiplicity 1; -2, multiplicity 2; degree 3
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anyone please?
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(x+3)(x+2)^2
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>>7808454
This
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How does science explain homosexuality?
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Glitch in evolution.
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>>7808123
Having extra males around for labor, hunting, and protection without having them compete for females is a huge evolutionary advantage for populations
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The Greeks and Romans damned our race forever.
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/sci/ how do you possibly expect to compete with Mac's flawless argument against evolution?
https://www.youtube.com/watch?v=16p_16BguFM
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>>7807868
Anyone who has taken an intro course in biology could probably understand the foundational papers of evolutionary biology. So they are just retarded.
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It is true that appeal to authority effects the direction of science all the time. Just like how the christian church was the authority that led people to believe the earth was flat, and how the modern scientific reverants like michio kaku and degrasse is bullshitting people about quantum magic.
its a shame for sure
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>>7807897
Isn't quantum physics just our current best understanding of the universe?