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Jarek Duda

@jarekduda

Physicist (PhD), computer scientist (PhD), assistant professor at Jagiellonian University, known for ANS coding (used by e.g. Linux kernel, JPEG XL) Articles: http://th.if.uj.edu.pl/~dudaj/

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04.12.2024
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Latest posts by Jarek Duda @jarekduda

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Einstein's teleparallelism is basically 4D liquid crystal: en.wikipedia.org/wiki/Telepar...

11.03.2026 17:11 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
This Spacetime Quasicrystal Could Solve Physicists’ Biggest Problem
This Spacetime Quasicrystal Could Solve Physicists’ Biggest Problem YouTube video by Sabine Hossenfelder

What is space, really? That’s one of the biggest questions in science. According to a pair of researchers from the Perimeter Institute, the answer to that is: a quasicrystal. What is a quasicrystal, and how is space a quasicrystal? Let’s take a look.

www.youtube.com/watch?v=0azO...

11.03.2026 16:28 πŸ‘ 23 πŸ” 4 πŸ’¬ 7 πŸ“Œ 0
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Maybe liquid crystals? Lot's happening in this direction, e.g.:
- quark strings nonperturbatively modeled as topological vortices e.g. www.sciencedirect.com/science/arti...
- point-like elementary charges, also obtained as topological, e.g. www.nature.com/articles/s41... , arxiv.org/pdf/2108.07896

11.03.2026 16:35 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Does gravitational radiation exist? - General Relativity and Gravitation An attempt is made to extend the Wheeler and Feynman absorber theory of electromagnetic radiation to the case of the gravitational field (described by the Einstein linear weak-field equations) on the ...

In 1977 Rosen questioned existence of GW because of unavoidable by symmetry advanced waves travelling toward our past-was this issue finally resolved?
link.springer.com/article/10.1...
If not, maybe it should finally tested experimentally, e.g. arxiv.org/pdf/2512.20692
#GravitationalWave @ligo.org

04.03.2026 06:39 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Minimal QM interpretation: just accept Lagrangian formalism successful from QFT to GR (17 questions)
Minimal QM interpretation: just accept Lagrangian formalism successful from QFT to GR (17 questions) YouTube video by Jarek Duda

While quantum shamans claim there is magic, consciousness etc. needed to understand QM ... Feynman ensembles show we just need to accept math: Lagrangian formalism - everything is already there
www.youtube.com/watch?v=8hdl...

28.02.2026 07:58 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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ps. I see you work with BH information paradox - worth to start asking this question for white hole - which continuously emit interacting with environment, heating matter around.
Applying T/CPT symmetry, black hole should also interact - by negative radiation pressure, cooling matter around.

28.02.2026 06:32 πŸ‘ 0 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Are Waves Traveling Backward in Time Hidden in Our Universe? (2512.20692)
Are Waves Traveling Backward in Time Hidden in Our Universe? (2512.20692) YouTube video by Emergent Mind

This graphic seems clear - what exactly you dont get?
www.youtube.com/watch?v=NsI5...

28.02.2026 06:07 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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One of my examples: en.wikipedia.org/wiki/Asymmet... - that piercing the mainstream wall is really tough.
First ~decade ignored, then aversion by experts as it obsoletes many their articles ... and currently the basic language of our electronics - e.g. in Linux kernel, JPEG XL.

28.02.2026 04:23 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Cover of I Told You So!

Cover of I Told You So!

"In his new book, I Told You So!, Matt Kaplanβ€”a longtime science correspondent for The Economistβ€”traces a lineage of internal resistance to paradigm-changing scientific ideas from the Victorian era to today."

Read the #ScienceBooks Review: https://scim.ag/4c70qjX

24.02.2026 20:20 πŸ‘ 55 πŸ” 16 πŸ’¬ 1 πŸ“Œ 2
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Already Maxwell equations have solutions traveling in both time directions ... and e.g. LIGO seems to see both: arxiv.org/pdf/2512.20692

27.02.2026 04:54 πŸ‘ 1 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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Physics is CPT symmetric - applying it and evolving backward to Big Bang and further, it should be quite symmetric before - nearly requiring Big Bounce.
en.wikipedia.org/wiki/CPT_sym...

27.02.2026 04:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

on overworked single developer working for free

26.02.2026 05:40 πŸ‘ 0 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
zstd - Wikipedia

Since 2017 Linux kernel uses Zstd (LZ+tANS) - developed by corporation so should be safer
en.wikipedia.org/wiki/Zstd#Us...

26.02.2026 05:14 πŸ‘ 2 πŸ” 0 πŸ’¬ 1 πŸ“Œ 0
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The problem is that current photonic have only one-way control, while standard electronics has two-way: push&pull electrons through chip.
To reach their full potential e.g. www.qaif.org/2wqc we need to also get two-way photonic computers.

25.02.2026 16:19 πŸ‘ 3 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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While standard one-way quantum computers (1WQC) are unlikely to break current cryptography/currency, 2WQC ( qaif.org/2wqc ) seem quit close like classical electronics pushing&pulling electrons through chip, and in theory might break nearly all-solve NP, also having better error correction.

23.02.2026 18:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Neural Stem Cells and How They Communicate
Neural Stem Cells and How They Communicate YouTube video by The Stem Cell Regeneration Center

Behavior of real neurons - very different from e.g. MLP/KAN ... but maybe we can/should get closer with ANNs, e.g. arxiv.org/pdf/2405.05097 ?
www.youtube.com/watch?v=lldJ...

23.02.2026 18:08 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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AI exceeded capabilities of human mathematicians

20.02.2026 03:18 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Timeline of Polish science and technology - Wikipedia

As today is Polish Science Day, here is a good summary of its achievements:
en.wikipedia.org/wiki/Timelin...

19.02.2026 12:32 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Old galaxies in a young universe? The standard cosmological model (present-day version of "Big Bang," called Lambda-CDM) gives an age of the universe close to 13.8 billion years and much younger when we explore the universe at high-re...

They found galaxy looking older then the Universe - with 4.7 sigma for JADES-1050323.
So could galaxy survive Big Bounce?
phys.org/news/2026-02...
physics.stackexchange.com/questions/85...
#astronomy

16.02.2026 14:33 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Google Chrome 145 Released With JPEG-XL Image Support Back in 2022 Google deprecated and then removed JPEG-XL image support from the Chrome/Chromium browser codebase and now in 2026 it's back

www.phoronix.com/news/Chrome-...
Chrome 145 (current) has started support of JPEG XL long-term JPEG successor, which should soon replace JPG, PNG, GIF - greatly reducing size and improving quality of our images and photos. Firefox and PDF are next.

16.02.2026 07:29 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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While for classical computers we can push&pull electrons through a chip: have two-way control(2W), for quantum there is only focus on 1WQC.
Reaching 2WQC ( www.qaif.org/2wqc ), in theory they could solve NP problems, have better error correction...requiring PQC resistant to NP-solvers.
#Quantum #PQC

16.02.2026 04:43 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0

And what would be the color of white hole?

14.02.2026 15:31 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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As it didn't have retarded EM counterpart, can we be really certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various observational suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making it even more interesting.

14.02.2026 11:11 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Congratulations!
As it didn't have retarded EM counterpart, can we be really certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making LISA even more interesting.

14.02.2026 05:20 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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Congratulations!
As it didn't have retarded EM counterpart, can we be really certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making it even more interesting.

14.02.2026 05:18 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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LIGO might soon turn out even more interesting - as there was observed only 1 (retarded) EM counterpart per ~400 events, and mathematically also advanced solutions are allowed.
More arguments e.g. "too early events", missing SMBHs for PTA (if only retarded): arxiv.org/pdf/2512.20692
#GW10Years

14.02.2026 04:59 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
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arxiv.org/pdf/2601.03326
Detailed description of shape modulo rotation - extending PCA to higher order tensor/polynomial - e.g. for chemoinformatics, evaluating shape similarity, 2D image/3D object search

14.02.2026 04:20 πŸ‘ 2 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

As it didn't have retarded EM counterpart, can we be certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making it even more interesting.

14.02.2026 02:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

As it didn't have retarded EM counterpart, can we be certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making it even more interesting.

14.02.2026 02:47 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0
Post image

As it didn't have retarded EM counterpart, can we be certain it was retarded event (not advanced)?
Both are mathematically allowed, and there are various suggestions LIGO sees both (e.g. arxiv.org/pdf/2512.20692 ) - making it even more interesting.

14.02.2026 02:46 πŸ‘ 1 πŸ” 0 πŸ’¬ 0 πŸ“Œ 0