If something does a quantum jump, what causes it to decide doing so at a particular time and not another? It is expected that a continuous cause would have continuous effects.
This concern was raised immediately by Rutherford while reviewing the Bohr model in 1913 as mentioned in The Quantum Story by Jim Baggott (2011) page 32.
CCP dynasty Updated 2025-07-16
Everything can break everything Updated 2025-07-16
Whenever someone asks:
I can only see this one thing different our setups, do you think it could be the cause of our different behaviour?
you don't need to read anymore, just point them to this page immediately. Virtualization for the win.
Little Boy Updated 2025-07-16
Uranium-based, dropped on Hiroshima. The uranium was enriched at the Clinton Engineer Works.
SageMath Updated 2025-07-16
A Python wrapper over a bunch of numeric and computer algebra system packages to try and fully replace MATLAB et. al.
For example, their
Quickstart tutorial at: www.sagemath.org/tour-quickstart.html From this we see that they are very opinionated, you don't need to import anything, everything has a pre-defined global name, which is convenient, e.g.:
is the 3D vector space over the rationals. This also suggests that they are quite focused on computer algebra as opposed to numerical.
Celestron NexStar Updated 2025-07-16
Video 1.
Celestron NexStar SE Tutorial by Astronomia UK (2022)
Source. Meh! ;-)
Four arts Updated 2025-07-16
Four Beauties Updated 2025-07-16
Figure 1.
A modern rendition of the four beauties
. Source. TODO we need a decent older one with CC BY-SA, and illustrating their attributes! Wikimedia failed me.
Los Alamos, New Mexico Updated 2025-07-16
Video 1.
This is why we moved here by Syd and Macky (2022)
Source.
Ming dynasty Updated 2025-07-16
New York Updated 2025-07-16

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