Archived threads in /sci/ - Science & Math - 1898. page

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How to find the two graphs for which the distance between two of their points is 2 when the line joining those points is angled so that the angle is pi/2 at 0 and linearly approaches 0 when approaching c, and the same applies symmetrically when approaching -c?
The graphs only need to have this property in (-c-1, c+1)

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if one dimensional objects have length,
two dimensional objects have area,
three dimensional objects have volume
what do four dimensional objects have?
or higher dimensional ones?

what do zero dimensional objects have?

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What would you say is his most important contribution to mankind?

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Alright /sci/, let's pretend this hypothetical scenario where you find this skeptic guy. You begin a chat with him, and this is how it goes:

>I love my dog, but he's going to die pretty soon
>But how do you know?
>It's very old
>But how do you know?
>Because he's like 15 dude
>But how do you know?
>Dude, I've had him for all these years
>But how do you know?
>Because I remember it asshole
>But how do you know these memories are not false?
>They aren't dude, I can verify it with information and facts from the outer world
>But how do you know?

Alternatively:

>Fuck you, I think therefore I am
>But how do you know?
>Because I'm experiencing my existence directly
>But how do you know?

What would you do if you ever found a person like this?

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https://math.stackexchange.com/questions/285201/path-to-basics-in-algebraic-geometry-from-hs-algebra-and-calculus

OK, so I have started my path toward algebraic geometry; however, I have trouble understanding this Javier's English, perhaps you could help me?

Question 0: It would be easier if someone could make a reading order from Javier's text, I'm having trouble with it. Can anyone please help me with this? I would like a definitive list (without any choices between texts that I have to make) from Javier's text.

Question 1: When he says:
>Geometry by Its History by A. Ostermann and Geometry by R. Fenn, or Elementary Euclidean Geometry: An Undergraduate Introduction by C.G. Gibson
Does he meant both Ostermann's and Fenn's book or just Gibson's or does he mean Ostermann and Fenn's or Ostermann and Gibson?

Question 2: I'm guessing based on the comma that he means Ostermann and Fenn or just Gibson but I can't tell based on some of his other grammar mistakes. Which one should I choose?

Question 3: When he says:
>Here you will need formal linear algebra like Jänich, or like Hausner, or like Banchoff/Wermer
Does he mean before Geometry by M. Audin or after Geometry vol. I and vol. II by M. Berger?

Question 4: Should I go with Jänich, Hausner, or Banchoff/Wermer?

Question 5: When he says:
>For this you will also need multivariable calculus and vector analysis: Advanced Calculus: A Geometric View by J.J. Callahan
Does he mean I need it before Geometries by A. B. Sossinsky?

Question 6:
>The most important thing at first is to get what is all about, i.e. how loci defined by solutions to systems of polynomial equations generalize to abstract algebraic varieties and their regular and rational morphisms
What does he mean here?

(cont.)

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CS books thread

Post them

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can someone explain this part "|x - z| + |z - y|" is used in this proof?

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Where were you when you realized this had no integer solutions, /sci/?

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Mathematics/Physics motivational thread.

Man I know that this is off topic but I am all out of options here. Signed physics university because parents would kick me out otherwise, cant bullshit my way trough this like I did in highschool, have to study but I just dont have any drive. I just cant do it. I just cant force myself to study. Living in a pretty bad country with high unemployment and if parents kick me out I am done, I might legitimately die in the streets.
Literature is kinda intense, exams are too, I have never before seen this much intensity.. its not impossible, hell some things are even easy, but most of it requires a lot of practice to get an understanding.

I thought if I started uni I would meet people and get out of depression and my life would begin again, but I just cant make myself to study this, I didnt make any friends, most of the people came to the uni in their own little groups and the rest of us are a bunch of loners or dont care to socialize. I did half of my semester, passed stuff with 9's but those were piss easy things, I didnt even show up at actually important stuff. I dont have any drive to study.

I want 'the good life'. I want to move out of this country. I want to be essential/important (not like one of those piss easy useless hobby degrees). I want to work in a lab or in industry or with lasers/missiles/computers for a government/big business/some fancy place like that you see in Hollywood movies. I realize how important math and physics are, especially today.
But I just cant make myself study....

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Is engineering physics a meme? I heard people go in there and just come out unable to find jobs because they are neither engineers nor physicists. I'm currently taking Physics, but i'm considering on switching to Mechanical Engineering because the general consensus is that if you don't make it to Ph.D. and hence academia, you'll become a finance slave. I really want to stay and do something relevant to Physics where I'm genuinely interested to participate in Physics research in future either in optics or particle physics.
The reason why i'm considering Mechanical engineering is so that if shit works out, i can either work in the aviation industry or the space industry hopefully, and probably even advance to grad school with aerospace engineering specialization, so what do you guys reckon, wise men who have been through thick and thin, should I follow my dreams and continue on with Physics or simply switch to MEng for opportunity, safety and possibly you could say money. Because engineering physics from what i generally hear is out of the picture already.

Would really appreciate your feedback, Thanks Senpai

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How many years until the personal robot is a thing and can be seen in offices and work places?
When will middle class families be able to buy and own one like with the car?

[spoiler]I just want to fuck a robot

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What's the difference between the universe and reality?

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Is Mensa basically a huge joke?
Granted, it seems like out of all of the high IQ societies, they provide the most benefits along with the membership compared to Intertel or Triple Nine, but it seems like for Mensa especially, you don't need that high of an IQ to join.
I guess by high IQ I mean like, 140+.

I was taking the Mensa work out because I thought it'd be a great way to eventually become smarter, after all, Mensa is about promoting intellectual growth. I was actually really happy because I got a high score on it; But then I realized that I had taken it a year ago. It wasn't that I was smart, it's just that the test hasn't changed.
https://mensa.org/workout.php

What is the point of High IQ societies other than smart people circle jerking and drinking at a bar once a month?

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https://www.youtube.com/watch?v=efsD-AlDxEo

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>tfw your thesis manuscript just went over 100 pages