Was (wer) ist symbol-level - definition
NOTATION THAT DEFINES REGULAR POLYTOPES AND TESSELLATIONS
Schlafli symbol; Schlaefli symbol; Extended Schlafli symbol; Extended Schläfli symbol
Symbol level
In knowledge-based systems, agents choose actions based on the principle of rationality to move closer to a desired goal. The agent is able to make decisions based on knowledge it has about the world (see knowledge level).
Symbol (typeface)
TYPEFACE FOR GREEK AND MATHEMATICAL SYMBOLS
Symbol font; Symbol (font); Symbol.ttf; MS Symbol; Radicalex; Radical extender; Ventura Symbol; Mac OS Symbol; Code page 1038; X-mac-symbol
Symbol is one of the four standard fonts available on all PostScript-based printers, starting with Apple's original LaserWriter (1985). It contains a complete unaccented Greek alphabet (upper and lower case) and a selection of commonly used mathematical symbols.
Extinction symbol
.jpg?width=200 "Flag with the extinction symbol")
![[[Extinction Rebellion]], London (2019)](https://commons.wikimedia.org/wiki/Special:FilePath/Extinction Rebellion London (46740878965).jpg?width=200 "[[Extinction Rebellion]], London (2019)")
SYMBOL REPRESENTING THREAT OF MASS EXTINCTION
Extinction Symbol
The extinction symbol represents the threat of holocene extinction on Earth; a circle represents the planet and a stylised hourglass is a warning that time is running out for many species. The symbol dates to at least 2012 and has been attributed to anonymous East London artist Goldfrog ESP.
Wikipedia
Schläfli symbol
In geometry, the Schläfli symbol is a notation of the form that defines regular polytopes and tessellations.
The Schläfli symbol is named after the 19th-century Swiss mathematician Ludwig Schläfli,: 143 who generalized Euclidean geometry to more than three dimensions and discovered all their convex regular polytopes, including the six that occur in four dimensions.
