Kids on this sub when they realise approximations are EVERYWHERE in physics
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πŸ“°︎ r/physicsmemes
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πŸ‘€︎ u/oakley_
πŸ“…︎ Feb 22 2021
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It's probably been done before, but these are my zeroing trajectories on Reserve. They're mostly approximations but they work. I hope someone finds this useful!
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πŸ“°︎ r/EscapefromTarkov
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πŸ‘€︎ u/su1c1d3_4ndr01d
πŸ“…︎ Feb 23 2021
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i love that this is the closest approximation to Maris we have
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πŸ“°︎ r/Frasier
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πŸ‘€︎ u/Scissorman82
πŸ“…︎ Feb 24 2021
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An approximation of what my sims see
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πŸ“°︎ r/thesims
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πŸ‘€︎ u/GigaPico
πŸ“…︎ Feb 13 2021
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My approximation of StarCraft 2's Battlecruiser in Star Trek Online
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πŸ“°︎ r/starcraft
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πŸ‘€︎ u/DilaZirK
πŸ“…︎ Feb 06 2021
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Anyone else's lecturers get annoyed at their own problems because it makes "ridiculous approximations" and "it is a ludicrous problem as a result"?

It's like he had to quit his job as head engineer at NASA and is angry because he has to teach us bums now. I get a good kick out of his little rants though.

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πŸ‘€︎ u/jordan_belford5
πŸ“…︎ Feb 11 2021
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What's the point of a Taylor series/approximation?

Hello everyone, my Calculus class just reached Taylor/Maclaurin polynomials. While I understand how to do them, I'm confused as to their exact use. If you had time to differentiate a function so many times to make a mere approximation, and the facilities to do as such, why can't you just calculate the function directly? Plugging numbers into the approximation also often seems far more difficult than doing the equation itself.

Any help would be greatly appreciated!

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πŸ“°︎ r/calculus
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πŸ‘€︎ u/CarlyRaeJepsenFTW
πŸ“…︎ Feb 18 2021
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The best approximation in my heart
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πŸ“°︎ r/engineeringmemes
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πŸ‘€︎ u/ferdicten
πŸ“…︎ Feb 11 2021
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My Best Approximation of Character Types in Super Smash Bros. Ultimate
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πŸ‘€︎ u/NoireReqii
πŸ“…︎ Feb 19 2021
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Created my favorite Golden Age trio in Artbreeeder. Are they a good approximation to you all?
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πŸ“°︎ r/Berserk
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πŸ‘€︎ u/nosleep299
πŸ“…︎ Dec 01 2020
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The Awful Uncertainty of the Coronavirus Death Toll - The new numberβ€”half a million Americans deadβ€”is only an approximation of the pandemic’s real effects. newyorker.com/science/ele…
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πŸ“°︎ r/Coronavirus
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πŸ‘€︎ u/Waldonville
πŸ“…︎ Feb 22 2021
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Quand MΓ©lenchon cumule les approximations sur la vaccination m.huffingtonpost.fr/entry…
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πŸ“°︎ r/france
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πŸ‘€︎ u/C_kloug
πŸ“…︎ Jan 18 2021
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Vague approximation of what skies would look like in my red dwarf orbiting ringworld
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πŸ“°︎ r/worldbuilding
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πŸ‘€︎ u/Mega2chan
πŸ“…︎ Feb 24 2021
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Is the 7.98"/mileΒ² formula a good approximation?

I see this formula tossed around a lot to "demonstrate"' that you shouldn't be able to see something from X spot on Earth due to curvature. I know that this formula defines a parabola but i also see people say it's a neat approximation for how much you wouldn't be able to see due to Earth's curvature.

Though i noticed that it's a bit of a messy formula since depending on where you are and where you're looking, the curvature changes (if i were on the west coast of Canada and looked at the West, i'll see a much more noticeable curvature than if i did the same the US' west coast), it also seems to get really extremist due to it being squared and it if i draw it on a cartesian plane it'll be a parabola with serious differences the more miles you add.

I know that Flat Earthers use this formula as the one and only formula to calculate Earth's curvature but it lacking the important variable of the position you're in and where you're looking seems a bit sketchy, not to mention it gets really extremist the more miles you add.

So is this equation really a nice approximation or is it just a geometrical mess?

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πŸ“°︎ r/notaglobe
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πŸ‘€︎ u/X07345
πŸ“…︎ Feb 04 2021
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Thanks, I hate approximations.
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πŸ“°︎ r/TIHI
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πŸ‘€︎ u/Reddit_Knight_
πŸ“…︎ Jan 17 2021
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Group is playing City of Mist for the first time. I made a high-quality approximation of our group. Wish me luck.
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πŸ“°︎ r/cityofmist
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πŸ‘€︎ u/Big-Bosselot
πŸ“…︎ Feb 24 2021
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Bad Approximations of Pi

Are there any good sources on bad approximations of pi over the years? I've considered making a video about pi when Pi Day comes this year, but I feel like conventional approaches/topics have been done to death.

I know that Numberphile did a video about the 3.2 law, and there's misconceptions about a certain passage in the Torah being incorrect, but that's about all I know.

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πŸ“°︎ r/math
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πŸ“…︎ Feb 21 2021
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"We're now going to make an approximation of Honduran Crema"
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πŸ‘€︎ u/HappyPenguinInc
πŸ“…︎ Jan 27 2021
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[The Matrix] Does the Matrix simulation endlessly replay the whole 20th Century or are the people within it living out an approximation of the 1990s for roughly 100 years at a time?

I know that each iteration of the Matrix lasts roughly 100 years before a reboot is needed, admittedly I do not know if the various reboots are completely different incarnations (for instance, I know there was a β€œparadise” version of the Matrix and also a β€œnightmare” version of the Matrix at various points). My question is, assuming the form of the Matrix we’re introduced to has existed for a few cycles and the whole β€œActual late 20th Century” version isn’t just the latest attempt; did the Machines somehow get people to ignore the fact that the same decade has existed for a literal century or does the clock get constantly reset to 1900 and end in 1999? I know, at the very least, everything the machines use for their various functions as programs existed by the year 1900, such as phones for the agents to enter the world and interact. But also, the Machines do not want life to be extreme suffering for the humans, yes? Because I do believe recreating the world wars is likely beyond what the Machines can even do?

Can anyone help me out here?

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πŸ“…︎ Feb 14 2021
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Here is my derivation of the far field approximation of the electric field due to a dipole (along the axis of the dipole). Graphs included (but not batteries). youtu.be/eh7uzVqvhlo
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πŸ“°︎ r/Physics
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πŸ‘€︎ u/rhettallain
πŸ“…︎ Jan 25 2021
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Better harmonic approximation?

It seems to me that log(x+1/2)+gamma is a much better approximation of the harmonic numbers than log(x)+gamma is. log(x+1/2) gets arbitrarily close to log(x) as they approach infinity, so maybe the difference doesn't matter much, but at every step of the way, log(x+1/2) seems to be a much better approximation. How come this is so, and how come log(x) is used so often instead?

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πŸ“°︎ r/math
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πŸ‘€︎ u/Irish_Stu
πŸ“…︎ Feb 24 2021
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Best approximation of my taste... Still not quite happy with it but it took so long to make
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πŸ“°︎ r/Topster
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πŸ“…︎ Feb 19 2021
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I spotted this flag as a decal on a jeep in southern idaho. I was unable to get a picture of it but I made this approximation. The stripe was clear as to show the color behind it.
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πŸ“°︎ r/vexillology
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πŸ‘€︎ u/Chrisfindlay
πŸ“…︎ Feb 22 2021
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How can I avoid using fifth glyph in math if I'm using an approximation for a formula: limit as n->infinity of (1+1/n)^n? Writing a full formula would not work in this class.
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πŸ“°︎ r/AVoid5
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πŸ‘€︎ u/CrimsonKing516
πŸ“…︎ Jan 20 2021
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Small angle approximation in action
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πŸ“°︎ r/physicsmemes
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πŸ‘€︎ u/luminous_radio
πŸ“…︎ Jan 01 2021
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What is the β€œapproximation” for how big a singularity is? Because it doesn’t show up in the app reddit.com/gallery/kft43v
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πŸ“°︎ r/kurzgesagt
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πŸ‘€︎ u/FF-coolbeans
πŸ“…︎ Dec 18 2020
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Approximations go brrr
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πŸ“°︎ r/engineeringmemes
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πŸ‘€︎ u/Tyuee
πŸ“…︎ Feb 07 2021
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"Don't worry, Operator! I've created an approximation of the Lotus until she comes back!"
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πŸ‘€︎ u/Blind0bserver
πŸ“…︎ Feb 02 2021
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How relevant is approximation theory?

There seems to be some research activity in the past years but I'm not sure if any of it is relevant outside of the field itself, which is not large at all. I know about Tao's recent advance in Sendov's conjecture, which truly seems intriguing and interdisciplinary. Also, I'm fairly convinced that the theory is useful because I've been taught quite some applications in my numeric analysis class when I was an undergraduate. The question is more like: is it an interesting field that not many people care about or is it simply dying?

I'm asking the question because I have the option to pursue approximation theory for my master's thesis. Kolmogorov-type inequalities, to be precise. This question may fit more into the career and education thread, however I think it is general enough to get its own thread since it is about a field of math and may (or may not) generate a healthy discussion.

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πŸ“°︎ r/math
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πŸ‘€︎ u/IanisVasilev
πŸ“…︎ Feb 13 2021
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A collection of my favourite approximations for pi
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πŸ“°︎ r/3Blue1Brown
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πŸ‘€︎ u/misterblue28
πŸ“…︎ Dec 26 2020
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A neat trick for square root approximation

I have a fun little exercise for you all:

Pick a positive number and call this number x.

I will give you a starting value of c = 7. Now, take out a calculator and evaluate (x-4)/(c-4), and assign this to be the new value of c. Repeat 10 times.

Finally, evaluate 2-c for the last value of c you calculated. What is this value? I claim it is an approximation of the square root of x, surprisingly enough! Check and you'll see.

Personally, I think it's a pretty nifty trick. If want to know how I came up with this seemingly arbitrary process and why it works, I recently wrote a math paper that you can find on arXiv that details the whole thing. If you have the time, please read it and let me know what you thought of it! Thank you!

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πŸ“°︎ r/math
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πŸ‘€︎ u/WilliamGerst
πŸ“…︎ Jan 24 2021
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Too much approximation is child abuse
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πŸ“°︎ r/mathmemes
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πŸ“…︎ Jan 24 2021
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Requesting a suitable approximation for 1/x ?

Hey so I have been trying to work on a personal project in digital electronics and at the moment, im exploring on approximations for 1/x for x between 0 and 1. I have come across the tailor series but implementing that on an fpga/asic is very hardware consuming due the to multiple multiplications required. Hence, I reach out to this community to suggest some other approximations to evaluate 1/x within the values 0 and 1.

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πŸ“°︎ r/math
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πŸ‘€︎ u/99blackcat99
πŸ“…︎ Feb 02 2021
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How would one solve 1β€’βˆš(1+2β€’βˆš(1+3β€’βˆš(1+4... without approximation?
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πŸ“°︎ r/learnmath
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πŸ‘€︎ u/Farkle_Griffen
πŸ“…︎ Feb 14 2021
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How should i begin approaching this problem? Im trying to create this type of grid model with only the boundry conditions and then use a central diffrence approximation by iteration to find the values inside the borders. I started by creating a simple matrix with the boundry values
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πŸ“°︎ r/matlab
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πŸ‘€︎ u/SibbiRocket
πŸ“…︎ Feb 17 2021
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TIL over time diamond degrades to graphite as its atoms internally rearrange and relax to a lower energy state. However, at Earth's surface temperature, this process can take millions of years, which makes the phrase "diamonds are forever" a very good approximation to reality on a human time-scale. wtamu.edu/~cbaird/sq/2013…
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πŸ“°︎ r/todayilearned
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πŸ‘€︎ u/DioriteLover
πŸ“…︎ Oct 06 2020
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Sinusoidal surface with quadratic Taylor approximation paraboloid
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πŸ“°︎ r/mathpics
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πŸ‘€︎ u/sam-lb
πŸ“…︎ Jan 31 2021
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Genshin's approximation of XP Bliss Wallpaper
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πŸ“°︎ r/Genshin_Impact
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πŸ‘€︎ u/ZX3000GT1
πŸ“…︎ Jan 11 2021
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Roundtable Rival by Lindsay Sterling is a good approximation of what Xadian Music probably sounds like hundreds of years after the events of this show took place and it progresses into whatever the equivilant of modern day is
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πŸ“°︎ r/TheDragonPrince
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πŸ‘€︎ u/Receiver527
πŸ“…︎ Feb 15 2021
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Multi-objective genetic algorithms as neural networks optimizer - New results with novel mutation operator inspired by simultaneous perturbation stochastic approximation reddit.com/gallery/lp6gby
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πŸ‘€︎ u/Cosmolithe
πŸ“…︎ Feb 21 2021
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TIL Straight and proportionally spaced frets in instruments are only an approximation of "true temperament", or the type of tuning that allows perfect harmonies. A pair of inventors developed a type of guitar neck that allows for true temperament, with wobbly frets that aren't evenly spaced. pmtonline.co.uk/blog/2009…
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πŸ“°︎ r/todayilearned
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πŸ‘€︎ u/rlemmie
πŸ“…︎ Jan 21 2021
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Closest approximation of Boris I could do without Premium
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πŸ“°︎ r/LifeofBoris
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πŸ‘€︎ u/vtol_ssto
πŸ“…︎ Feb 17 2021
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Taylor approximation goes brrrrrrrrr
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πŸ“°︎ r/physicsmemes
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πŸ‘€︎ u/HemingwaysLiver
πŸ“…︎ Nov 24 2020
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Cardboard cut into 1/4” strips makes a decent approximation of 2x4’s in 1:12 scale! It’s a long time until I’m able to have chickens so I’m building my dream henhouse for my desk instead.
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πŸ“°︎ r/miniatures
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πŸ‘€︎ u/MojoShoujo
πŸ“…︎ Jan 30 2021
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Riemann zeta at odd integers vs. Euler's zigzag number, any reasons for this amazingly close approximation?

I hope the mathematician around here could provide me with an answer. I was learning about zeta function from Wikipedia, and playing around on Wolfram alpha. Then a relevation struck, and I tested out the following computation.

Let n be an integers >=2, look at the formula:

C(n)=(2^n+1 -2 )pi^-n zeta(n)Gamma(n)

Why this formula? Usually, even integer value of zeta is described in term of Bernoulli number. However, Bernoulli number is 0 for odd integers, so the formula doesn't work there. But...there is a different sequence, related to the Bernoulli number for even integers, but give different meaningful value for odd integers as well. This is Euler's zigzag number A(n), also known as alternating permutation number, up/down number, or Andre's number. The number A(n-1) is related to the Bernoulli number B(n) so the index is shifted by 1. This give me the question: can you compute the zigzag number from values of zeta function, and vice versa?

So I wrote a formula that compute the zigzag number, starting with zeta function, for all even integers, using the known relationship between zeta function, Bernoulli number and zigzag number. This is the formula above. Now what would happen if I plug odd integers >=3 into the formula? I plugged this in Wolfram alpha, and....

The values are extremely close!!! Here is the sequence for A(n):

https://oeis.org/A000111

Looking at only even-index from 2 onward, the first few terms are 1,5,61,1385,50521,2702765

What about the value of C(n)? Plugging into Wolfram alpha, the first few values (ignoring the digits after the decimal point) are, for n=3,5,7,9,11,13:

1., 5., 61., 1385., 50521., 2702768.

Yeah they are not exactly equal, but it's still staggering how close they are. The first time the error became >1 is at n=13. And I checked until the end of the listed sequence (n=27), it predicted over half of the digits correct.

My suspicion is that 0<=C(n)-A(n-1)<=A(n-1)^1/2 for all odd integers n>=3, but I'm not sure.

EDIT: just to be safe, I also compare A(n-1) against (2^n+1 -2 )pi^-n Gamma(n) which has no zeta factor. It does predict a few digits correct, but the accuracy drop dramatically. This suggests that zeta(n) is an important factor that make the prediction close, even though it's almost equal to 1.

But I don't know enough math to see why. And after searching around the World Wide Web, I see no mentions of this relationship between zeta function and zigzag number, even though it seems so ob

... keep reading on reddit ➑

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πŸ“°︎ r/math
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πŸ‘€︎ u/throwaway4275571
πŸ“…︎ Jan 23 2021
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Approximation
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πŸ“°︎ r/tumblr
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πŸ‘€︎ u/Hummerous
πŸ“…︎ Jan 12 2021
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It kept morphing in my brain and this is the closest approximation that I can remember
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πŸ‘€︎ u/trelian5
πŸ“…︎ Feb 15 2021
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