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/sci/ - Science & Math

 Name Options Subject Comment Verification 4chan Pass users can bypass this verification. [Learn More] [Login] File Please read the Rules and FAQ before posting.Use TeX with $tags for inline and [eqn] tags for block equations.Right-click equations to view the source.  08/21/20 New boards added: /vrpg/, /vmg/, /vst/ and /vm/ 05/04/17 New trial board added: /bant/ - International/Random 10/04/16 New board for 4chan Pass users: /vip/ - Very Important Posts [Hide] [Show All] ### Janitor acceptance emails will be sent out over the coming weeks. Make sure to check your spam box! Self-serve ads are available again! Check out our new advertising page here. [Catalog] [Archive] File: clots.png (505 KB, 599x568) 505 KB PNG >every vaccine causes bloodclots Nice vaccine you have there. 58 replies and 8 images omitted. Click here to view. >> >>12972186 based gif poster >> >>12972186 Unironically kys. You are a waste of space. >> >>12968999 sputnik doesn't. westerners btfo'd again >> >>12969401 why would you even need to take it if you're of normal health? you have a natural immune system >> >>12972186 Relax bro, just saying that the efforts to suppress vaccine deaths will probably be evened out by the efforts to suppress Covid deaths. https://youtu.be/zL52lG6aNIY 13 replies omitted. Click here to view. >> >>12969768 how can anyone pay attention to a word she says, im lost in those blue eyes uwu >> >>12969850 You have AIDS >> >>12969768 1/2, by definition. It's a fair coin tossed once. The fact that you get asked once or twice has no bearing in that probability. >> For it to be 1/3, there necessarily has to be another random element in the problem. For example, the coin gets tossed a second time if it comes up tails, and if it lands on heads she gets asked on Monday and on tails she gets asked on Tuesday. It's a retarded question for this reason. There is no specification whether there is a second random element dictating the odds of being asked on Monday or Tuesday. If you assume that element exists, then yeah it's 1/3. If you assume there is not a second random element, then it's 1/2. >> >>12969768 If you want to solve probabilistic misleading riddles don't use conditioning, instead ask yourself things like "what if I do it one billion times". Here, by assuming there is a way to drug the girl so that the experiment works (and that she's immortal, so the game lasts 1 billion weeks) we can quantify things. What are the rules? 1st rule set: Does the lady wins one penny every time she gives the correct answer? 2nd rule set: Does she earns one penny every week she has given the correct answer at least once? In one case the halfer point of view gives the correct assessment of the game, and in the other it is the thirder which also gives the proper strategy to maximize gains. File: crick.jpg (26 KB, 624x351) 26 KB JPG hey /sci/ i've asked /out/ and /an/ but they were no help. let's see how smart /sci/ is so i love listening to crickets in the evening, my yard has always had them but for the last 3 years, they seem to have disappeared. no change in vegetation or anything. maybe its just part of the insect extinction in progress. so how do i attract crickets to my yard? google is no help, it just warns not to buy them from pet stores and release them in the wild, as they may be an invasive species. 4 replies omitted. Click here to view. >> >>12972339 >Alexa, play cricket sounds >> Cicadas > Crickets >> >>12972339 where do you live? >> >>12972339 it is very wide and tall tree's, i am thinking acorn type of tree's or maple, and wet or semi wet land, you know your doing it right when there are songbirds visiting every day >> >>12972339 Talk to an entomologist in your local biology institute (if you have one) and ask them where did all the crickets go too. Pesticides, invasive species, climate change etc. all affect the entire generations of these insects. They are bound to appear again some other time, though. You might just have to wait. >>12972429 >>12972430 Don't listen to these retards. Most of those eggs sold in pet stores are imported from other countries and they aren't local species. They can turn invasive very quickly and wipe out the local crickets. File: 1618140063012.jpg (45 KB, 600x600) 45 KB JPG Refute this 20 replies and 1 image omitted. Click here to view. >> >>12970998 https://www.youtube.com/watch?v=Go2Ccw1G25o >> >>12972454 This is amazing >> File: 1618385297426.jpg (43 KB, 640x640) 43 KB JPG >>12970998 >Google duck penis >Pictures >> >>12972445 That's normal in the animal kingodm. Only human females are wretched enough to shame men for lasting only 20 seconds! >> >>12970998 >someones lying yes , you are dinosaurs were not minimal style 2d cookie cutter shapes. lizards iguana's and even crocodiles with long tales are not extinct. 1/10 got me to reply File: feeeeerrfafdd.png (360 KB, 730x400) 360 KB PNG Why is the average penis size where it is at when, anatomically speaking, a bigger penis feels better and has a greater chance making a girl orgasm? Also, women report their preference to be above-average too. >inb4 female pleasure is not important for reproduction A relationship doesn't last if the girl is not sexually satisfied. 89 replies and 10 images omitted. Click here to view. >> >>12968372 Ah yes. Because breeding is based on dick size. You guys need to go outside more, it will make you less depressed. >> File: 1608650298262.png (367 KB, 1200x800) 367 KB PNG >>12971035 Yikes, homie. Get that porn addiction sorted. >> >>12968339 This is wrong its not penis size its testicle size >> >>12968294 >tfw 4 inches length and 4 inches girth >> >>12968608 Yes, and you would get that preference from observing it, not asking. Self reporting is worse than worthless in most cases. File: OaqR8pAB.jpg (32 KB, 512x512) 32 KB JPG Say my name 21 replies and 3 images omitted. Click here to view. >> >>12969213 Wait, he is 5'4? That got to be fake. He looks decently size in his video. >> >>12969093 OP never had the makings of a varsity poster. >> >>12969093 How much time of deep work can you do through your day, /sci/? I can do 5 hours if I dont go to the gym. >> >>12972784 >He looks decently size in his video when everyone is sitting, camera angles etc. hes a gigamanlet, there are very few images where he stands directly next to someone as comparison smaller than joe rogan, see >>12969274 >> >>12969093 Lex 'smarmy daddy issues midwit' Fuckboy File: images (2).jpg (8 KB, 285x177) 8 KB JPG Dying is going to fucking hurt. 1 reply and 1 image omitted. Click here to view. >> >>12972775 You're right, I'm going to make sure of it. >> File: 1468528001541.jpg (167 KB, 600x3031) 167 KB JPG >> >>12972794 You have to delete this >> >>12972794 based this is why i never say no to a new drug, gotta try em all >> >>12972775 I've been choked unconscious before and it's not bad at all. Death is overrated. what are the odds of our moon being the same size as the sun in the night sky? 23 replies omitted. Click here to view. >> >>12968042 the odds of the moon and sun being the size and distance that they are is and subtending similar angles in the sky 100%, utter certainty. >> >>12968124 >>12968069 >>12968226 >>12968272 Our single sun is way bigger than our single moon, but it's just far enough away that it appears almost exactly the same size when viewed from Earth. How do you not understand why that is an interesting coincidence? >> >>12968320 Apparently it is extremely rare, and if one day we discovered a galaxy full of aliens they would most likely visit Earth as tourists just to experience such an oddity. >> >>12968042 because life is good good loves you ? all the answer i have now >> >>12972845 i could go into fringe internet gathered answers that would make 4chan kick me out to x but i have pictures i can search up if you press me, then you will have a even bigger more questions than answers on our hands than op's post What is the simplest rule that generates complexity? 6 replies omitted. Click here to view. >> Mandelbrot map >> >>12972761 Julia is simpler since C remains a constant in each plot. >> >>12971230 the logistic map is very simple yet has bifurctions and chaotic behaviour >> The totality property for magmas >> >>12972761 Surely multiplication over N is simpler? It generates the primes. File: 765.jpg (111 KB, 800x534) 111 KB JPG Is there a biological explanation for why women are more attracted to men who have girlfriends or wives? 38 replies and 2 images omitted. Click here to view. >> >>12963502 The whole time reading your post I was just waiting for something to make sense. Well done for being a schizo. >> >>12963502 >gensp What the hell is that? >> >>12963502 you are a fucking hilarious genius. My sides are obliterated >> >>12963502 saved >> >>12972652 It's pen Only that when I know I'm gonna write a word a bunch of times i just copy it and paste it but i wrote it wrong the first time File: download (1).png (3 KB, 236x159) 3 KB PNG This is a mysterious number. Understanding it will help us solve the Riemann Hypothesis 3 replies omitted. Click here to view. >> >>12968913 Is it just me or should the last one have minus in the middle instead of plus? >> >>12969614 No. >>12968928 How is a derivative defined if the numerator and denominator are both 0? >> >>12970710 I should clarify, it is the sum not difference because the zeta function has a pole at 1, so approaching from opposite directions can give a number with a different complex phase. >> >>12968913 Fun fact: [math]\gamma$ is the regularized sum of the harmonic series.
https://mathoverflow.net/questions/3204/does-any-method-of-summing-divergent-series-work-on-the-harmonic-series
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>>12969614
z(1+s)~1/s
z(1-s)~-1/s>>12969546

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>muh racial intelligence
pic related is one of many examples of blacks outthinking whites
heres another
>blacks are too dumb to waste a dozen years of their early adulthood and several hundred thousand on getting a piece of paper which says they are smart
maybe they have confidence in their thinking abilities based on something other than their ability to regurgitate indoctrination from a textbook or maybe blacks are just happy being "too dumb" to buy a phd

no amount of intentionally misleading infographics will ever convince me that whites are superior until i see some smart behavior from whites with my own two eyes, as it stands presently, blacks seem smarter than whites do.
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>>12971740
its called manufacturing consent
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>>12971740
>haha nigger behavior is niggerish therefore all actions they do are without merit
Shalom Goldstein
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>>12972193
No, what I think you're saying is a misinterpretation of the midwit theory. I think the dumbest people are the midwits and through sheer force of numbers, the midwits are able to mischaracterize as unintelligent some, but not all, of the more intelligent people that the midwits envy and fear. The people who escape mischaracterization are people like Thomas Edison, who go to lengths to ingratiate themselves to the midwits as a means to an end.
Edison was already wealthy & successful on his own when he decided to go get a university degree, Edison didn't want to offend all the wealthy powerful people with degrees by outsmarting them, so he spent some time at Carnegie Melon or Case Western "earning" a sheepskin to disguise his lone wolf look.
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>>12972739
that one isn't really good evidence, but look at this one, blacks are out looting right now, making their own opportunities for free stuff, n-words are off the chart to the right of gigachad in this one.
plus they don't have any gay student debt to pay off

File: CV_watching.jpg (129 KB, 1009x614)
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This thread is dedicated to the mathematical aspects of computation. It doesn't matter whether or not it's theoretical CS or applied. Old thread here: >>12841837

This thread features computer vision (CV).

Here are some resources for beginners:
https://teachyourselfcs.com/

Free books:
https://z-lib.org/
http://gen.lib.rus.ec/
https://spoon.wiki/Books

Here are some resources to get you started.

Linear algebra (free online!):
You only need to understand material from the first 4 chapters to get started with CV.

Computer Vision: Algorithms and Applications (free online!):
https://szeliski.org/Book/

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>>12969157
>>12969327
They try and sanitize the pedagogy early on, so you have no idea what calculus and linear algebra are good for, especially in CS.
That, and the fact that calc 2 is the first STEM weed out course, it's not uncommon to see a lot of CS majors appreciate math late into their career. I think this is why it's really important for CS departments to actually motivate the theory they teach.

I want to laugh at many CS majors for not being able to do basic calculus, but the sad truth is that a lot of CS departments don't do enough to show how calculus is used in things *as mundane as* analyzing an algorithm or solving some classic problems from other fields of science using computers in a clever way. Unironically, I think if they added a class called "theoretical tools and their applications" to the CS canon, where they taught hardline uses of generating functions, correlation inequalities, spectral graph theory, vector calculus, and Fourier transforms (hell, those are even used in the discrete boolean setting), I think CS majors might *groan* but would be unable to say the "yawn, where is this useful?" That, and they'd scoff less at the calculus because it actually matters.
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>>12969530
Yeah what you said is true. But a professor in my dept told me that there is a real pressure from industry on schools to make CS courses focus more on "code" and "problem solving".
And a lot of the students want to code things like games and software don't help.
Making a mandatory theory course and their applications in CS would be good but there has to be someone who is a big deal in the field to start it first.
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>>12970547
Yeah there seems to have been lots of pressure from the industry to dumb down CS programs huh.
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>>12969157
what resources were the most useful in learning ML and the relevant math?
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>>12972012
Not the guy you’re responding to, but it really depends on what part of ML you want to work with. But everyone eventually has to hunker down to understand Hilbert space, measure theory, etc.

Discuss
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>>12972458
>complex numbers with 0 as their imaginary part aren't real
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>>12972458
>quaternions are real
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>>12972669
quaternions are an extension of complex numbers
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>>12972458
Nigga you dumb
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>>12972681
>split-complex numbers are real

File: fda-logo-800x383.jpg (35 KB, 800x383)
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why doen't they ban plastic from food handling and packaging?
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>>12970120
What do you replace it with that won't drive up prices?
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>>12972317
Styrofoam clamshells.
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>>12972526
see >>12970120
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>>12972526
Plastic. Glass is nice, but it's heavy and highly breakable. I'd love to do away with plastic, but in terms of shipping, durability, and price, it's going to be very hard to find a comparable replacement unless I'm missing something.
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>>12972618
Seaweed

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