Archived threads in /sci/ - Science & Math - 1973. page

Anonymous
2016-01-17 02:47:31 Post No.7789443
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Anonymous 2016-01-17 02:47:31 Post No. 7789443 [Report] [View this topic]

given that pi is transcendental

and e is transcendental

can we rigorously prove that their sum and product are transcendental? better yet, can we prove that they HAVE to be transcendental if pi and e are?

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Anonymous 2016-01-17 03:43:11 Post No.7789524
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Anonymous 2016-01-17 03:43:11 Post No.7789524 [Report]

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>>7789443

Anonymous 2016-01-17 03:47:58 Post No.7789529
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Anonymous 2016-01-17 03:47:58 Post No.7789529 [Report]

>>7789443
maybe you could use Euler's formula in some way to disprove it?

Anonymous 2016-01-17 03:56:54 Post No.7789545
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Anonymous 2016-01-17 03:56:54 Post No.7789545 [Report]

This is still an unsolved problem. However it IS known that π + eπ, πeπ and eπ√n are all transcendental.

Anonymous
2016-01-17 02:33:04 Post No.7789423
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Anonymous 2016-01-17 02:33:04 Post No. 7789423 [Report] [View this topic]

Looking at the moon in Celestia and I found this little wobble in its orbit. The red arc is the moon's path and the lower blue arc is the Earth's path. Probably hard to tell from the image, but the wobble is directly beneath (I guess "beneath" doesn't have much meaning in space) the Earth's path.

Anyway, is this just a bug in the software or does the moon's orbit actually dip in like that?

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Anonymous 2016-01-17 02:37:13 Post No.7789432
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Here is a zoomed-out view from "above" showing where the dip is in relation to the Earth.

Anonymous 2016-01-17 13:58:55 Post No.7790382
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Anonymous 2016-01-17 13:58:55 Post No.7790382 [Report]

>>7789432
probably a glitch with the orbits, i saw it happens a few times aswell

Anonymous 2016-01-17 14:05:56 Post No.7790399
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>>7789423
This is gravity from another universe.

Anonymous
Secretary Problem 2016-01-17 02:09:14 Post No.7789385
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Secretary Problem Anonymous 2016-01-17 02:09:14 Post No. 7789385 [Report] [View this topic]

I didn't understand the secretary problem. So The best canditate is always who the fuck gets luck to be interviewed while I'm 37% throught my way or it says that I have only 37% of chance to find the best candidate of a set if I can't call them back after saying a no?

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Anonymous 2016-01-17 02:13:12 Post No.7789390
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Anonymous 2016-01-17 02:13:12 Post No.7789390 [Report]

>>7789385
It is bullshit based on more bullshit. Don't waste your time on it.

Anonymous 2016-01-17 02:17:54 Post No.7789398
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Anonymous 2016-01-17 02:17:54 Post No.7789398 [Report]

>>7789385
http://demonstrations.wolfram.com/TheSecretaryProblem/

Anonymous 2016-01-17 02:24:55 Post No.7789412
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Anonymous 2016-01-17 02:24:55 Post No.7789412 [Report]

>>7789390

So any better alternative?

Anonymous
2016-01-17 01:52:57 Post No.7789358
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Anonymous 2016-01-17 01:52:57 Post No. 7789358 [Report] [View this topic]

What's a good diet to do that will help me improve my brain /sci/?

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Anonymous 2016-01-17 02:18:55 Post No.7789400
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Anonymous 2016-01-17 02:18:55 Post No.7789400 [Report]

>>7789358
Shameless self bump.

Anonymous 2016-01-17 03:10:45 Post No.7789479
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Anonymous 2016-01-17 03:10:45 Post No.7789479 [Report]

Nothing but jenkem

Anonymous 2016-01-17 03:43:47 Post No.7789525
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Anonymous 2016-01-17 03:43:47 Post No.7789525 [Report]

>>7789358
Healthy foods. Don't over eat. Exercise. Literally it.

35351
2016-01-17 01:52:43 Post No.7789356
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35351 2016-01-17 01:52:43 Post No. 7789356 [Report] [View this topic]

Which way does the universe stack

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Anonymous 2016-01-17 02:27:39 Post No.7789417
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Anonymous 2016-01-17 02:27:39 Post No.7789417 [Report]

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Are pulsars like unique and do the all choose to spin the same way?
>Twirl pool
>are we still in the first universe
>no
But I think thes a provable connection too

Anonymous 2016-01-17 02:32:16 Post No.7789421
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Anonymous 2016-01-17 02:32:16 Post No.7789421 [Report]

>>7789417
Pulsars are part of alien communications systems. How they are set is determined by their location.

bansai 2016-01-17 04:29:24 Post No.7789587
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bansai 2016-01-17 04:29:24 Post No.7789587 [Report]

http://youtu.be/RBumgq5yVrA
>making equations

Anonymous
2016-01-17 01:48:55 Post No.7789349
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Anonymous 2016-01-17 01:48:55 Post No. 7789349 [Report] [View this topic]

Last Thread

>>7777475

Post whatever you are working on, share the best books for beginners and people that is interested in learning or taking engineering.

>What are you studying/did you study?
>What projects are you working on?
>Did you go to college or are you autodidact?
>Which books are the best for your area?

Wiki:

http://4chan-science.wikia.com/wiki/Mechanical_and_Aerospace_Engineering
http://4chan-science.wikia.com/wiki/Electrical_and_Electronics_Engineering
http://4chan-science.wikia.com/wiki/Computer_Science_and_Engineering
http://4chan-science.wikia.com/wiki/Chemical_Engineering

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Anonymous 2016-01-17 01:55:12 Post No.7789366
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>>7789349
>What are you studying/did you study?
Did BS in ME, doing MS in AE
>What projects?
Stress analysis on a big plane
>Which books?
I'm taking a course on damage tolerance, which uses a textbook compiled from notes, and a course on mechanics of materials, using pic related

Anonymous 2016-01-17 06:55:01 Post No.7789779
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Anonymous 2016-01-17 06:55:01 Post No.7789779 [Report]

CE, everything with Discrete Maths and Combinatorics in the title is a must in your repertoire.

Anonymous 2016-01-17 07:42:58 Post No.7789846
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Anonymous 2016-01-17 07:42:58 Post No.7789846 [Report]

>>7789366
taking an internal combustion engines class as one of my senior electives. the project is worth 60% of the grade. have to build/modify an IC engine and take a bunch of readings with Dyno Sim.

anybody got any ideas?

also, Solidworks flow simulation a shit.

Anonymous
2016-01-17 01:27:56 Post No.7789317
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Anonymous 2016-01-17 01:27:56 Post No. 7789317 [Report] [View this topic]

How do I fucking focus on science and learning when video games and 4chan exist

Why do emotions overpower logic and reason

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Anonymous 2016-01-17 01:31:02 Post No.7789325
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Anonymous 2016-01-17 01:31:02 Post No.7789325 [Report]

Have to fight your animal brain and instincts. Literally fighting yourself. It's tough when the source of all free knowledge is also the source of all distractions, so you could just buy books and get rid of your internet capabilities and computer for the time being.

Anonymous 2016-01-17 01:54:29 Post No.7789363
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Anonymous 2016-01-17 01:54:29 Post No.7789363 [Report]

http://waitbutwhy.com/2015/03/procrastination-matrix.html

Anonymous 2016-01-17 02:25:38 Post No.7789413
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Anonymous 2016-01-17 02:25:38 Post No.7789413 [Report]

>>7789317
Change your diet. That will help.

Anonymous
2016-01-17 01:05:31 Post No.7789263
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Anonymous 2016-01-17 01:05:31 Post No. 7789263 [Report] [View this topic]

Can anyone familiar with Levi-Civita point me in the right direction with this? I must be messing something trivial up or forgetting some commutation.
Also, can anyone show this simply with differential forms? I don't know much about them except that they exist.

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Anonymous 2016-01-17 01:30:24 Post No.7789322
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Anonymous 2016-01-17 01:30:24 Post No.7789322 [Report]

delta(ij) . a(j) = a(i), not a(j)
this might fix it
sorry if you're doing some weird index switching and I'm an idiot

Anonymous 2016-01-17 01:31:47 Post No.7789326
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Anonymous 2016-01-17 01:31:47 Post No.7789326 [Report]

Well for one the derivative operator doesn't commute with B.

Anonymous 2016-01-17 01:35:07 Post No.7789330
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Anonymous 2016-01-17 01:35:07 Post No.7789330 [Report]

>>7789322
I'm not sure what you mean. I think the indices are solid, it worked to get bac-cab above.

>>7789326
This might be my fuck up. Do you mean in going from my delta functions to the lines written in red?

Anonymous
2016-01-17 01:05:03 Post No.7789260
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Anonymous 2016-01-17 01:05:03 Post No. 7789260 [Report] [View this topic]

what kind of program are you interested in taking? here's one i find neat.

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Anonymous 2016-01-17 01:11:20 Post No.7789276
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Anonymous 2016-01-17 01:11:20 Post No.7789276 [Report]

>>7789260
Looks like a pretty standard physics program (which is good)

Doing a Master's in AE now, specializing in solid mechanics and composites, but if I ever do a second, Penn State's Master's in Acoustics would be cool

http://www.acs.psu.edu/DistanceEducation/CourseListing.aspx

Anonymous 2016-01-17 01:14:48 Post No.7789285
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Anonymous 2016-01-17 01:14:48 Post No.7789285 [Report]

>>7789276
do you think studying mechanical engineering is better than physics? i'm worried about losing the opportunity to have accreditation employment wise, but i'm worried about course selection being redundant since i already know how to use CAD and matlab.

Anonymous 2016-01-17 01:20:25 Post No.7789300
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Anonymous 2016-01-17 01:20:25 Post No.7789300 [Report]

>>7789285
Depends a lot on your goals, honestly. For me (and my family's finances), it was important to get a good-paying job as soon as possible, leaving further education for evening classes, so I went with Mechanical. It got me a great job right away, and I could still satisfy my physics curiosity through electives/extra classes.

If you're sure you want to go the PhD route, and aren't really that worried about employability in the short term, pure physics might be better.

Anonymous
Is this legit? 2016-01-17 00:50:46 Post No.7789228
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Is this legit? Anonymous 2016-01-17 00:50:46 Post No. 7789228 [Report] [View this topic]

Is this legit? average user of /sci is a genius?

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Anonymous 2016-01-17 00:51:51 Post No.7789230
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Anonymous 2016-01-17 00:51:51 Post No.7789230 [Report]

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>>7789228
You are retarded.

Anonymous 2016-01-17 00:56:36 Post No.7789241
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Anonymous 2016-01-17 00:56:36 Post No.7789241 [Report]

>>7789228

People lie and cheat. Most of the faggots doing IQ tests on here probably look up the answers.

Anonymous 2016-01-17 01:16:02 Post No.7789289
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Anonymous 2016-01-17 01:16:02 Post No.7789289 [Report]

>>7789241
Lol, that image is bullshit.

Anonymous
2016-01-17 00:49:35 Post No.7789226
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Anonymous 2016-01-17 00:49:35 Post No. 7789226 [Report] [View this topic]

Thoughts on this math text book? It is required for this Calculus class im taking this semester.

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Anonymous 2016-01-17 00:52:41 Post No.7789232
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Anonymous 2016-01-17 00:52:41 Post No.7789232 [Report]

Overpriced shit but if you need it you need it I guess.

Anonymous 2016-01-17 00:56:16 Post No.7789240
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Anonymous 2016-01-17 00:56:16 Post No.7789240 [Report]

>>7789232
It's not overpriced at all. You can rent it on Amazon for $18.

Anonymous 2016-01-17 01:09:49 Post No.7789271
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Anonymous 2016-01-17 01:09:49 Post No.7789271 [Report]

>>7789232
>shit
Care to elaborate?

Anonymous
2016-01-17 00:45:38 Post No.7789225
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Anonymous 2016-01-17 00:45:38 Post No. 7789225 [Report] [View this topic]

This is incredible. This guy has an IQ higher than 200. His autism must be directed towards a scientific cause.

He derives the laws of quantum dynamics from Super Mario 64.

https://www.youtube.com/watch?v=kpk2tdsPh0A

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Anonymous 2016-01-17 00:51:34 Post No.7789229
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Anonymous 2016-01-17 00:51:34 Post No.7789229 [Report]

>>7789225
This is /v/ material, not /sci/ material.

Anonymous 2016-01-17 01:17:14 Post No.7789292
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Anonymous 2016-01-17 01:17:14 Post No.7789292 [Report]

>>7789225
Higher than 200? Where does it say that
Or are you a 14 year old fanboy

Anonymous
2016-01-17 00:43:29 Post No.7789220
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Anonymous 2016-01-17 00:43:29 Post No. 7789220 [Report] [View this topic]

is it possible to do "weighted" gradient descent on piece wise defined functions?

>inb4 hurr durr retard

like doing a bias of one term over the other, if it is possible, what would the graph/gradients even look like or mean?

its easy to say that the gradients are pointing towards the downward/upward slope, but what would it geometrically look like in R3 for weighted piecewise functions?

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Anonymous 2016-01-17 00:49:54 Post No.7789227
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Anonymous 2016-01-17 00:49:54 Post No.7789227 [Report]

I guess the functions would have to be differentiable and smooth. So it would look like any normal gradient, aesthetically. I don't know what you mean by weighted.

Anonymous
The End 2016-01-17 00:35:37 Post No.7789214
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The End Anonymous 2016-01-17 00:35:37 Post No. 7789214 [Report] [View this topic]

Crunch, rip or heat death? Which is most likely?

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Anonymous 2016-01-17 00:42:59 Post No.7789218
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Anonymous 2016-01-17 00:42:59 Post No.7789218 [Report]

Dying a virgin is for you

Anonymous 2016-01-17 00:45:37 Post No.7789224
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Anonymous 2016-01-17 00:45:37 Post No.7789224 [Report]

>>7789218
Dying of AIDS is for you

Anonymous 2016-01-17 00:54:29 Post No.7789236
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Anonymous 2016-01-17 00:54:29 Post No.7789236 [Report]

>>7789224
autism

Anonymous
2016-01-17 00:34:57 Post No.7789211
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Anonymous 2016-01-17 00:34:57 Post No. 7789211 [Report] [View this topic]

neat.

http://arxiv.org/pdf/1504.00333v3.pdf

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Anonymous 2016-01-17 01:32:04 Post No.7789328
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Anonymous 2016-01-17 01:32:04 Post No.7789328 [Report]

Do you have any fraction of an idea of what that paper is saying?

Anonymous 2016-01-17 01:52:22 Post No.7789355
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Anonymous 2016-01-17 01:52:22 Post No.7789355 [Report]

>>7789328

what are you implying, friendo?

Anonymous 2016-01-17 02:03:36 Post No.7789379
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Anonymous 2016-01-17 02:03:36 Post No.7789379 [Report]

>>7789328
Gravity = EM

Archived threads in /sci/ - Science & Math - 1973. page

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible. Read more on this topic here - https://archived.moe/talk/thread/1694/

I'm aware that Imgur.com will stop allowing adult images since 15th of May. I'm taking actions to backup as much data as possible.
Read more on this topic here - https://archived.moe/talk/thread/1694/