PROMYS Europe 2024 problem set Set 2 P6 by 
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 P5 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 P4 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 P3 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 P2 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 P1 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 Q2 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
PROMYS Europe 2024 problem set Set 2 Q1 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12Also posted at:
- wiki.bbchallenge.org/w/index.php?title=Antihydra&oldid=958 But obviously it got deleted, not even a tiny shitpage maintained by 5 people is immune to deletionism
- cstheory.stackexchange.com/questions/20978/what-is-the-smallest-turing-machine-where-it-is-unknown-if-it-halts-or-not/53326#53326
- cs.stackexchange.com/questions/59344/what-are-very-short-programs-with-unknown-halting-status/162108#162108
PROMYS Europe application problem set answers by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12 PROMYS Europe 2024 problem set Set 2 by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12Ciro Santilli got his hands on this one. But he was unable to obtain the others. Solving them here would also pose a serious DMCA risk, so perhaps it's just not worth it.
William Coolidge explains medical imaging and X-rays (1940).
Source. Video sponsored by General Electric. A cool insight of this video is that a hot cathode is a more reliable electron source. Previous systems, and presumably including the discovery of X-rays, leftover gas in the tube was used. But this makes things more difficult to control, as we also want to remove as much gas as possible from the vacuum, otherwise electrons collide with the gas and lose energy before hitting the anode.How Does X ray Tube Works by BiomedEngg
. Source. Describes in particular the rotating cathode method. Interesting observation that this is especially important since the cathode cannot cool quickly due to the vacuum. PROMYS Europe application problem set by Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12
Ciro Santilli 37 Updated 2025-05-23 +Created 2024-07-12- www.whatdotheyknow.com/request/maths_papers asked but didn't upload...
- www.whatdotheyknow.com/request/oxford_mathematics_prelims_past from 2021 asked for prelims only but no upload
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