Gold leaf by Ciro Santilli 37 Updated 2025-07-16
Video 1.
Hands: A Dublin Bookbinder
. Source. Some awesome gold leaf action!
The name makes absolutely no sense in modern terms, as nor colors nor light are used directly in the measurements. It is purely historical.
Distributive property by Ciro Santilli 37 Updated 2025-07-16
One of the defining properties of algebraic structure with two operations such as ring and field:
This property shows how the two operations interact.
Existence and uniqueness results are fundamental in mathematics because we often define objects by their properties, and then start calling them "the object", which is fantastically convenient.
But calling something "the object" only makes sense if there exists exactly one, and only one, object that satisfies the properties.
One particular context where these come up very explicitly is in solutions to differential equations, e.g. existence and uniqueness of solutions of partial differential equations.
CuriousMarc by Ciro Santilli 37 Updated 2025-07-16
Mostly on vintage electronics. Lots of focus on microwave, which he has worked a lot with.
Has been going wild with restoration and reverse engineering of the Apollo moon mission.
Video 1.
Inside the WILD Lab of CuriousMarc by Keysight Labs (2022)
Source.

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