Threads by latest replies - Page 2488

(23 replies)
No.13689987 ViewReplyOriginalReport
does anyone else hate midwits?
>they can't believe anyone else is smarter, resulting in constantly annyoing smarter people with "i am actually smarter than you", even asking their midwit friends to validate them in this
>obsess about smarter people because of that
>treat smarter people like trash
>talking trash about higher intelligent people hoping their social status would tank(which doesn't happen anyway for obv reasons)
>always throw their copes around which other people just validate either to be nice or to do group coping
>get angry when one tells them they are wrong
etc. I cant stand them. i hate them so much. i had to deal with them so many times. btw this is science related as in "why do midwits act like this?" and "midwits in scientific related communities" how do you deal with midwits?
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(7 replies)
No.13691516 ViewReplyOriginalReport
I'm in analysis right now, and I'm being told that for open set A and closed set B, A\B is definitely open. I feel like I've found a counterexample where A\B is closed, but every solution I've found claims this is wrong. Here's my solution:

Let A = {1/n for n in N} (open as it does not contain its limit point 0). A = {1, 1/2, 1/3, ... }
Let B = {1/(n+1) for n in N}U{0} (closed as it does contain its limit point 0, alternatively its complement is clearly open). B = {1/2, 1/3, 1/4, ... , 0}

A\B = {1}. The complement of A\B is {-inf,1}U{1,inf}, both of which are open intervals in R, hence open sets, and the union of open sets is open. The complement of A\B is open <=> A\B is closed. QED

Where is my mistake? I think the disagreement may come from whether a single element set is closed in general, but clearly for any non-trivial {a}, its complement in R (-inf,a)U(a,inf) is clearly open, so wouldnt it necessarily be closed?
2 posts omitted
(5 replies)

Science experiment

No.13691459 ViewReplyOriginalReport
Let's do a little scientific experiment. Tell me the first thing that comes to mind when you read these words.
>Computer
>Phone
>4chan
>Porn
>Earth
>USA
>China
>Friends
>Family
>Lover
>Work
>Fun
>Religion
>Science
(5 replies)
(31 replies)

Swastika inside a wheel

No.13690230 ViewReplyOriginalReport
Is you would fill the swastika with water for around 90% of the volume.

Could you rotate a wheel by pushing the water out of the left leg with compressed air?
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(5 replies)
No.13689237 ViewReplyOriginalReport
Is string field theory like quantum field theory? Are there still different fields for different types of particles or is it something completely different?
(333 replies)
No.13682245 ViewReplyLast 50OriginalReport
What is /sci/‘s answer to the Fermi Paradox?
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(5 replies)
No.13690349 ViewReplyOriginalReport
I think the peer reviewers didn't tell the French about it because it's funny
(7 replies)

Help Me

No.13690749 ViewReplyOriginalReport
I think I am unironically becoming a number theorist. I thought I was a complex geometry chad but I started learning number theory and now I cant stop? Its like when you think you will never be like your parents but now you realize you are well on your way to doing just that. Help I dont want to be an autist but the problems are just too juicy, the results too stunning.
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(5 replies)