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General chat for Physics SE (physics.stackexchange.com). For M...
Apr 11, 2023 16:59
Good afternoon physicists, I edit this comment if some user wants to study some videos from these official channels of YouTube. On the channel Oxford Philosophy of Physics you've the video with title Jim Al-Khalili: Life on the Edge - the dawn of quantum biology by professor Jameel Sadik "Jim" Al-Khalili CBE FRS FInstP (see Wikipedia) uploaded eight months ago. And other interesting channel is The Royal Institution.
Apr 8, 2023 19:21
Good nights physicists.
Apr 8, 2023 19:21
I add this reference that seems curious, if some user wants to read it *A persistent influence of supernovae on biodiversity over the Phanerozoic* by professor Henrik Svensmark, from the journal of
Wiley Online Library, Ecology and Evolution Volume 13, Issue3 March 2023.
Mar 30, 2023 18:13
I have no idea.
Mar 30, 2023 18:13
It seems that I have missed something, but I wanted to exemplify my ideas with one of my posts, I do not know how such comments and links can be illegitimate or offensive. Good afternoon.
Mar 30, 2023 17:58
Good afternoon.
Mar 30, 2023 17:58
I'm sorry if I bother you.
Mar 30, 2023 17:55
I imagine prime numbers as the figures F1, F2 or F3 from imgur.com/a/TlmdwHi that is one of attached file for my post Arithmetic billiards, prime numbers and the Goldbach conjecture this mathoverflow.net/questions/429420/… @ACuriousMind
Mar 30, 2023 17:54
Just a moment and I add a reference from MathOverflow and a draw from this post @Amit
Mar 30, 2023 17:52
Yes, just an attempt @Amit I imagine prime numbers as the shape L.
Mar 30, 2023 17:50
Hello to contributors of this chat, I add these references for my username user142929 of MathOverflow if you want to read (my attempts to get relations) about arithmetic billiards and prime numbers: you can to search in the browser of MathOverflow the key words arithmetic billiard, Goldbach conjecture, chirality, gnomon. Good afternoon physicists.
Mar 26, 2023 16:07
Hello to all users I'm disconnected in next hours, good afternoon. I add the link to Wikipedia Theory of everything, the section Arguments against if some user wants to read it en.wikipedia.org/wiki/Theory_of_everything#Arguments_against
Mar 23, 2023 18:31
For me here there is something: we never build these increadible spaceships which we could have exlored our solar system. Regards @Amit and all users of Physics Stack Exchange. I'm disconnected in next hours.
Mar 23, 2023 18:30
Other curiosity (about a device or technology, and about journeys) is that I've mentioned yesterday, the Project Orion (nuclear propulsion), this seems interesting for me and if there were implications of Gott's copernican principle or from Andy Grove's quote about his fundamental rule in technology.
Mar 23, 2023 18:25
Khalili from their book Life on the Edge: The Coming of Age of Quantum Biology Bantam Press, 2014 (I know the Spanish edition of the book). Thinking in the mentioned talk by professor Hossenfelder I think yes, biologists and physicists have discovered a new continent, it is the cell and the examples of quantum biology that the authors cite (how life tamed quantum mechanics)
Mar 23, 2023 18:25
The draws that I imagine interesting (and cited yesterday) for a new System of the World are Figures 10.1, 10.2 and 10.3 by professors Johnjoe McFadden and Jim Al-
Mar 23, 2023 13:52
I was visiting my family this morning. Good afternoon @Amit maybe in next few hours I add one or two comments more, but I don't want to bother here. I wondered if some friends of the chat would like to know the momument to Santiago Ramón y Cajal, search in Google the Spanish article of Wikipedia "Santiago Ramón y Cajal" and look at the illustration/photo at the right of the section Correspondencia de Santiago Ramón y Cajal, this moument is incredible (...FONS VITAE, FONS MORTIS).
Mar 22, 2023 19:20
Many thanks for your replies, you're incredible, The library (I have not internet at home) closes soon, tomorrow I'll add a good morning message for you. My belief is that the more important thing is to know our Solar System, and what happened in the past @Amit
Mar 22, 2023 19:17
A project that was failed is the Project Orion (nuclear propulsion). Please feel free to add more replies, you or your colleagues of the site, I can to add more speculations/ideas, in particular involving prime numbers as arithmetical billiards.
Mar 22, 2023 19:17
I refer regeneration (and all worlds of DNA/RNA, LUCA, biofilm/LECA, I think the stable structures as were explained professor Donella Meadows in her book Thinking in Systems) from the suspicion of the paradox en.wikipedia.org/wiki/Ship_of_Theseus
Mar 22, 2023 19:10
One crucial thing is that we don't know (please allow the plural) what our solar system was like and what happened in remote time
Mar 22, 2023 19:09
I see that you @Amit are very respectful although my speculations are very very very poor. In which I believe is in how do work the Nature the rafts of vegetation in Oceanic dispersal (Wikipedia) instead of humans dreams to travel as is showed in science fiction.
Mar 22, 2023 17:43
(4/4) The devices/artifacts were closely related to shipwrecks or journeys (navigation) in some way: the gnomon, the Antikythera mechanism, an astrolabe, the GPS... In my opinion we must to think the tree of Life as a system/device that probed our solar system. Many thanks.
Mar 22, 2023 17:43
(3/4) My belief is that in the diagram for the new System of the World we must to consider different ingredients a gravitational geon instead of the body "planet", to avoid to be Flat-earthers, and with the intention to probe the measurement problem, an open minded idea could be to consider agents as the hydra, octopus or a small lizard (all these animals have mechanisms of regeneration, see Wikipedia) instead the anthropocentric astronaut.
Mar 22, 2023 17:43
see the diagram from the section Other appearances from en.wikipedia.org/wiki/Newton%27s_cannonball(other inspiring diagram are en.wikipedia.org/wiki/Equivalence_principle and a figure that I can to refer from a book by professor Jim Al-Khalili of quantum biology).
Mar 22, 2023 17:43
(2/4) In my opinion for the achievement of quantum gravity which physicists need is to think (mainly) thought experiments (and maybe experimentum crucis), more than in tabletop experiments. The idea is to get the alchemy of general relativity and quantum mechanics in a simple diagram similar than the System of the World by Newton,
Mar 22, 2023 17:42
(1/4) I'm going to add some ideas about the mentioned video, but it is not my intention discuss the scientific speecha of professor since I'm not a scientist (I'm not a physicist) The talk of the professor is the video of YouTube Is science about to end? | Sabine Hossenfelder edited two weeks ago from the official channel Big Think. If I can edit some comments today and tomorrow. I can to expand more such ideas (the why of my words). I wait your replies.
Mar 22, 2023 14:20
Hello, to the attention of users or some member of moderator team (Hi @ACuriousMind) I would like to know if I can to add comments (myself ideas), here in this chat room, as a discussion of a video of YouTube Is science about to end? | Sabine Hossenfelder edited two weeks ago from the official channel Big Think. Many thanks.
Jan 25, 2023 16:12
Hello to the chat, I would like to know when the hypothesis of the article that I quote below could be tested: when can it be confirmed or ruled out that there is a primordial black hole in our solar system? The reference is the article on arXiv wiht identifier 1909.11090 and title What if Planet 9 is a Primordial Black Hole?, (24 Sep 2019).
 

 MathOverflow

General discussion for mathoverflow.net
Mar 25, 2023 15:20
Roger Penrose, and more!*, I hope don't bother contributors of this chat. Other instance that seem curious to me are Freeman Dyson's claims from the section Arguments against of the Wikipedia Theory of everything (I know that in the history of mathematics and physics there was an exchange of mathematical methods from these).
Mar 25, 2023 15:20
Hello to users of this chat of MathOverflow, I wondered if some contributor would like to see the video edited on the YouTube channel The Institute of Art and Ideas with title *What is wrong with current physics | Eric Lerner, Sabine Hossenfelder,
Mar 17, 2023 17:54
423567 from professors, and the deletion from a moderator of the post with title Falsifiability of a hypothesis, and elements of mathematical physics about a natural phenomenon at the edge of Solar System that I postulate with identifier 418732. I think that to close, or respectively, to delete these posts was unfair and wrong in my opinion.
Mar 17, 2023 17:54
I also reject the deletion of my post Crisis in physics: great picture for professional mathematicians, and the interplay of mathematics as optional question with identifier on MathOverflow
Mar 17, 2023 17:53
I, as user142929, want to add a rant for the attention for the moderators of MathOverflow. I reject the closure reason for my post with identifier 439701 and title Birth of a mathematical journal: a question inspired in a letter by Mittag-Leffler.
Mar 15, 2023 08:53
The post on Meta Physics Stack Exchange has identifier 14357 and title Asking if a post deleted on MathOverflow could be suitable for the main site Physics Stack Exchange
Mar 15, 2023 08:52
I've edited on Meta Physics Stack Exchange a post that was closed and deleted from MathOverflow, physics.meta.stackexchange.com/questions/14357/… . I add this comment for the attention of contributors and moderators of MathOverflow and I wish the best week for all users of both sites.
Mar 4, 2023 16:00
I'm agree with the deletion of my answer (that I edited yesterday) for the post with identifier 441619, I was missunderstanding the question. Many thanks all users, and many thanks for the professors who added comments (I was disconnected past hours of MathOverflow since I have not Internet at home).
 
Feb 15, 2023 19:32
Many thanks, the question is biology.stackexchange.com/questions/111382/… Best wishes.
Feb 12, 2023 19:31
The post that is deleted and I refer (and that is the motivation of my thougths about a nuclear armageddon) is mathoverflow.net/questions/418732/… , and I've search in other Internet browser and a copy of this post can be seen, thank Good.
Feb 12, 2023 19:27
I've read also about consequences of Gott's Copernican principle, and quantum biology. I can to be more clear, but when I've posted my speculations in MathOverflow my post was deleted.
Feb 12, 2023 19:27
NASA studied how Saharan dust travels across the ocean. It seems that in our solar system there was some catastrophe, and my belief is that life adapted to this catastrophe to get advantage of this.
Feb 12, 2023 19:27
On the other hand we abandoned the Project Orion (nuclear propulsion), my belief (see Wikipedia, I didn't read about it) as a consequence of a Partial Nuclear Test Ban Treaty, and you can to read also about the hero Stanislav Petrov fro Wikipedia.
Feb 12, 2023 19:26
For me the meaning of a "journey" @A.B. is similar than a phase transition of matter. I don't believe in science fiction, at that date rockets can take off in our atmosphere and return to earth safely, but not beyond.
Feb 12, 2023 18:53
You're very kindly @A.B. , I've asked days ago about ancient eukaryotes on the main site. On the other hand, my question about the nuclear armageddon that our our species can to cause, for me this is a nonsense: my belief is that nuclear power is a
it's a discovery, a tool, to explore our solar system (in special its edge), the rockets can safely leave and return to a planet's atmosphere, but not beyond.
Jan 24, 2023 13:29
With the word "weight" I want to understand mass expressed in the cited SI.
Jan 24, 2023 13:28
I was motivated and inspired to ask these questions in a book by Walter Álvarez and a graphic that refers in a book John D. Barrow.
Jan 24, 2023 13:25
There is a typo in my second question: I'm interested in the same estimations of volume an weight for alive animals that have not bilateral symmetry.
Jan 24, 2023 12:39
(the oldest and simplest of these fossiles) in the International System of Units. Other question of my interest are the same estimations of volume an weight for alive animals with bilateral symmetry. I apologize if my question bother some user of the site, I'm not a biologist. Many thanks, I wait your response.
 

 Mathematics

Associated with Math.SE; for both general discussion & math qu...
Jan 26, 2023 12:46
Many thanks @AkivaWeinberger I a bad programmer, this is why I was asking. Many thanks for your kind response and example with grey colours.
Jan 25, 2023 17:24
Hello to the chat, I wondered (as curiosity) if there are variants with fractals of optical illusions like than the Kanizsa's triangle or for the Ebbinghaus illusion. Wikipedia has the articles, in particular, Optical illusion and for Koch snowflake and it is well known the Sierpinski triangle.