Visualizing the Riemann hypothesis and analytic continuation by 3Blue1Brown (2016) by 
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01Good ultra quick visual non-mathematical introduction to the Riemann hypothesis and analytic continuation.
How to blackout your window without drilling Total Blackout Cassette Roller Blind from Order Blinds Online by Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01This is my first working setup, done in a rental friendly way without drilling. I am sure that it is possible to do it cheaper, better and with less work, but it the first one that worked for me, so I will document it.
Cost: 150 Dollars for a relatively large 130 x 158 cm window. They do not sell for windows much larger than that.
Bought from www.orderblinds.co.uk on June 2019.
My window faces East, and in summer the sun rises at around 5AM here, and I am a bit light sensitive and was getting destroyed.
This setup, together with:is good enough to allow me to sleep properly, which is priceless.
- the existing sliding curtains which were not enough on their own
- a cheap and comfortable Figure 2. "GO Travel sleeping mask" from the Pharmacy
Demonstration if everything goes exceptionally well:
How to fit a Total Blackout Cassette Roller Blind by Order Blinds Online (2016)
Source. The actual product name appears to be Bloc Blinds or BlocOut, Order Blinds appears to whitelabel them.However, not all will necessarily be fun and games as in that YouTube video, especially if you are doing it for the first time, and the main point of this article is to make you aware of that.
The first problem is that you may have to remove existing useless "privacy blinds" from the way, which can mean putting effort into learning how they work and, has a risk of damaging the property. So be smart and get a chair and a second person to help you out!
Next, fitting the side rails is not going to be that easy. The thing has to be tight to block the light, right? Careful not to scratch the bottom sill!
Then you will notice that, like in the video at youtu.be/cTVVe7codw4?t=106, you are expected to screw the side rails to the bottom wood / plastic sill of the window, which is not rental acceptable! So I didn't to that, but together with the black tape that I will mention next, it held well enough.
The top part requires hammering nails as shown on the video: youtu.be/cTVVe7codw4?t=24 but this is generally rental acceptable, and you can fill the holes afterwards.
Once you have the setup in place, it is likely that there will be some light gaps still, because it is basically impossible to make such large objects fit perfectly. This was especially true for the top of the window, but also for the sides, so I just used some black tape
So I added some wide (50mm) Figure 4. "Diall PVC repairing black tape" between the blind and the wall to completely seal off the light.
Diall PVC repairing black tape
. Source. This tape made things dark and was durable, but note at Section "Removal wall damage review" that it pulled bits of the plaster out with it during removal. I've since learnt about the existence of "painter’s tape"/masking tape, that might have been a better idea to protect the walls when pulling the tape off. It is worth noting that some of the painter's tape do come with a maximum number of days before you can pull them off, presumably after which wall damage becomes a possibility, e.g. Ciro saw one rateed 14 days.Why Wikipedia sucks: Section "Wikipedia".
Best languages:
The most important page of Wikipedia is undoubtedly: en.wikipedia.org/wiki/Wikipedia:Reliable_sources/Perennial_sources which lists the accepted and non accepted sources. Basically, the decision of what is true in this world.
Wikipedia is incredibly picky about copyright. E.g.: en.wikipedia.org/wiki/Wikipedia:Deletion_of_all_fair_use_images_of_living_people because "such portrait could be created". Yes, with a time machine, no problem! This does more harm than good... excessive!
Citing in Wikipedia is painful. Partly because of they have a billion different templates that you have to navigate. They should really have a system where you can easily reuse existing sources across articles! Section "How to use a single source multiple times in a Wikipedia article?"
- youtu.be/_Rt0eAPLDkM?t=113 encyclopedia correction stickers. OMG!
- youtu.be/_Rt0eAPLDkM?t=201 Jimmy was a moderator on MUD games
Inside the Wikimedia Foundation offices by Wikimedia Foundation (2008)
Source. What poor countries have to do to get richer Make your education system more efficient by Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01As Ciro has rambled infinitely at Section "University", the school system is hugely inefficient and a waste of time for everyone involved.
Instead, just use Section "OurBigBook.com" instead.
The key content previously on this page was moved to the following sections:
How to diagnose a genius by Wilhelm Ostwald (1909) by Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01
Ciro Santilli 35 Updated 2025-04-24 +Created 1970-01-01From the abstract:Ciro Santilli couldn't agree more... notably students must have a flexible choice of what to learn.
Much money, his student went on to say, is spent by various Governments in attempting to discover those people whose thorough education may be expected to bring in a return of value to the State, and the question how best to discover latent genius is an eminently practical one. After cogitation, Prof. Ostwald came to the conclusion that it is those students who cannot be kept on the rails - that is, who are not contented with methodical teaching - who have within them the seeds of genius
I was trying to learn about how some types of quantum computers work, when I came across this pearl:
en.wikipedia.org/wiki/Wolfgang_Paul#Scientific_results Wolfgang Paul, 1989 Nobel Prize in Physics winner, referred to Wolfgang Pauli, 1945 winner, as his "imaginary part".
There are unlisted articles, also show them or only show them.