MRS degree by Ciro Santilli 37 Updated 2025-07-16
After learning this term, Ciro Santilli finally understood that his actual major was MR, and not bullshit like applied mathematics or control theory.
Mamonas Assassinas by Ciro Santilli 37 Updated 2025-07-16
This incredibly foul mouthed band was incredibly funny.
Ciro Santilli was a bit young to understand the songs at the time, but the older boys were singing them, and he sang along. So maybe there is a nostalgia factor in play.
But it can't be just that. They are just too funny and brutal, even when Ciro re-listens to it as of 2020.
Many Brazilian religious cranks in were really happy when their plane crashed and killed all of them in 1996.
Best songs:
Wealth tax by Ciro Santilli 37 Updated 2025-07-16
Obviously coupled with measures to prevent capital flight. This would be a required step to achieve Ciro Santilli's dream of unconditional basic income.
Perhaps the election of Donald Trump in 2016 woke up the democrats at last, that they were just making empty promises without actually benefiting the poor? www.vox.com/2019/3/19/18240377/estate-tax-wealth-tax-70-percent-warren-sanders-aoc. Or is just another facade?
Bibliography:
Operating system by Ciro Santilli 37 Updated 2025-07-16
Magic software that allows you to write a single program that runs on a wide range of hardware.
Change sign if you swap two input values.
Quadratic form by Ciro Santilli 37 Updated 2025-07-16
Multivariate polynomial where each term has degree 2, e.g.:
is a quadratic form because each term has degree 2:
but e.g.:
is not because the term has degree 3.
More generally for any number of variables it can be written as:
There is a 1-to-1 relationship between quadratic forms and symmetric bilinear forms. In matrix representation, this can be written as:
where contains each of the variabes of the form, e.g. for 2 variables:
Strictly speaking, the associated bilinear form would not need to be a symmetric bilinear form, at least for the real numbers or complex numbers which are commutative. E.g.:
But that same matrix could also be written in symmetric form as:
so why not I guess, its simpler/more restricted.
Upside: superconducting above 92K, which is above the 77K of liquid nitrogen, and therefore much much cheaper to obtain and maintain than liquid helium.
Downside: it is brittle, so how do you make wires out of it? Still, can already be used in certain circuits, e.g. high temperature SQUID devices.
This single experimental observation/idea is the basis for all of special relativity.
Special relativity is the direct result of people bending their backs to accommodate for this really weird fact.
Lorentz transformation by Ciro Santilli 37 Updated 2025-07-16
The equation that allows us to calculate stuff in special relativity!
Take two observers with identical rules and stopwatch, and aligned axes, but one is on a car moving at towards the direction at speed .
When both observe an event, if we denote:
It is of course arbitrary who is standing and who is moving, we will just use the term "standing" for the one without primes.
Then the coordinates of the event observed by the observer on the car are:
where:
Note that if tends towards zero, then this reduces to the usual Galilean transformations which our intuition expects:
This explains why we don't observe special relativity in our daily lives: macroscopic objects move too slowly compared to light, and is almost zero.

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