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Dmitry Shintyakov proslijedio/la je TweetHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi
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Another surprisingly *blue* compound of trivalent iron: hexakis(urea) iron(III) nitrate [Fe(CON₂H₄)₆](NO₃)₃pic.twitter.com/9fBODOIPae
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cos(sqrt(x)) and cosh(sqrt(-x)) are actually the same curvepic.twitter.com/Sd0wibirnt
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Crystal of urea copper formate adduct, I believe the formula is Cu(HCO₂)₂·2N₂H₄CO Growth time is 2 months.pic.twitter.com/bhCofpAF6g
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Could it be a hygrocybe (waxcap)
#fungi? I don't know them well.pic.twitter.com/Qn9NR642tk
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This resembles a reversible cellular automaton I stumbled upon long ago http://dmishin.blogspot.com/2013/11/the-single-rotation-rule-remarkably.html … https://twitter.com/beesandbombs/status/1215996913641762820 …pic.twitter.com/xewIIQnOmJ
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Found this summer, not sure what is it. Some kind of slime mold or
#fungi? Second photo was taken on the next day - it slightly changed by that time. Location is western Russia.pic.twitter.com/1C33Raluf1
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This reminds me a photo I made few years ago. It resembles pictures of prehistoric battles, but actually it is a frost pattern on the dirt https://twitter.com/MrEwanMorrison/status/1214565230136586242 …pic.twitter.com/t3U4veaFdn
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Conjecture: the average of first n decimal digits of π after the point never exceeds value 37/7, which is reached after 14'th digit. The proof is probably way out of reach for modern mathematics. Probabilistically, the chance of it being false < 10^(-39000)pic.twitter.com/0RfiWjHQnC
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It might be my bad English, but for me "belief in meritocracy" is a belief that meritocracy is a good thing. While the article addresses a completely different belief: that the system we are living in actually implements meritocracy. I wonder is this confusion deliberate.https://twitter.com/skdh/status/1214059407748849664 …
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My favorite image taken this summer, also my current wallpaper.
#fungi, several specues of#moss and a spruce tree sapling on a rotten tree stumppic.twitter.com/udMmgzY36t
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Ahh, apparently, it is well known thing. Parabola axes are also known as "Simson lines" https://en.wikipedia.org/wiki/Simson_line … And their envelope is "Steiner deltoid", due to Jacob Steiner who described it in 1856
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By the way, here is the equation of the envelope, when three points are (0,0), (0,1) and (a,b)pic.twitter.com/Hm0bJ0vWch
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Take 3 fixed points and draw parabolas through them. Then the envelope of the axes of these parabolas (green lines) is a figure with 3-fold rotational symmetry. I proved it using wxMaxima: https://www.dropbox.com/s/c495vnqbummfhsj/three_points_parabola_axis.wxmx?dl=0 … But don't have a good explanation of this facthttps://twitter.com/_fucata_/status/1213015546632925184 …
1:10Prikaži ovu nitHvala. Twitter će to iskoristiti za poboljšanje vaše vremenske crte. PoništiPoništi -
Dmitry Shintyakov proslijedio/la je Tweet
Particle Life: A Game of Life Made of Particles video https://youtu.be/Z_zmZ23grXE code https://github.com/fnky/particle-life … demo https://fnky.github.io/particle-life/ pic.twitter.com/ZBKkrzVytU
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Dmitry Shintyakov proslijedio/la je Tweet
Lenia - Mathematical Life Forms; Lenia is a 2D cellular automata with continuous space, time and states. It produces a huge variety of interesting life forms https://github.com/Chakazul/Lenia pic.twitter.com/PpH3rw3gHu
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Dmitry Shintyakov proslijedio/la je Tweet
On the steps leading up to our front door. I think they followed me home.pic.twitter.com/2SttOmmPmh
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Dmitry Shintyakov proslijedio/la je Tweet
Here's a video of a Chimpanzee using Instagram. It's eye-opening. https://www.instagram.com/p/Bwf080_Bfby/ pic.twitter.com/d9AjhfPNN1
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Probably, [Fe(CON₂H₄)₆]₂[ZnCl₄]₃ - hexakis(urea) tetrachlorozincate At least, qualitative analysis shows presence of Fe(III), Zn and absence of Cu(II). Blue color is due to hexakis(irea) iron(III) complex.pic.twitter.com/cuUyR6rs1o
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A trivial fact that I never noticed before. Powering is *almost* commutative, satisfying relation x^y = f(x)^g(y), where g∘f=id. I wonder is there a special name for such operation property.pic.twitter.com/zvvPDu8aZT
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