- js/confirm-close.html: stackoverflow.com/questions/7317273/warn-user-before-leaving-web-page-with-unsaved-changes
- web-cheat/js-image-load.html: load an image from JavaScript dynamically: stackoverflow.com/questions/226847/what-is-the-best-javascript-code-to-create-an-img-element
- web-cheat/js-image-load-viewport.html: load an image from JavaScript dynamically when it would become visible on the viewport: stackoverflow.com/questions/2321907/how-do-you-make-images-load-only-when-they-are-in-the-viewport
- html/img-load-lazy.html: stackoverflow.com/questions/2321907/how-do-you-make-images-load-lazily-only-when-they-are-in-the-viewport/57389607#57389607
- web-cheat/esm.html: ESM modules
- js/keydown.html: stackoverflow.com/questions/16006583/capturing-ctrlz-key-combination-in-javascript
External libraries
- Text editors
- Interactive HTML table sorting
2D wave equation on a circular domain by 
Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01Appears to be analogous to the dot product, but also defined for infinite dimensions.
Historical correspondence between Latin and Greek by Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01 Matrix representation of a Hermitian form by Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01
Ciro Santilli 37 Updated 2025-06-17 +Created 1970-01-01Good selection: Acústico MTV - Gilberto Gil (1994).
- 1967 Louvação (1967) album
Video 1. Lunik 9 Gilberto Gil (1967)Source. Ciro Santilli prefers Elis Regina's interpretation however. - 1972 Expresso 2222 album.
Video 2. Expresso 2222 by Gilberto Gil (1972)Source. youtu.be/aSFahdu5ga8?t=4584 In the 2002 documentary Tempo Rei he explains the origin of the song as being based on seeing trains come by in Bahia, when they still existed before the automobile decimation. - 1975 Refazenda (1975) album. This album is just too Legendary. The cover is also legendary.
- Date unclear
Video 8. A Paz by Gilberto Gil (1967)Source. Performed 2009. The earliest recording we can find is from 1994: www.discogs.com/master/190615-Gilberto-Gil-Unplugged
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