Up tack
Up tack's theme is one that has captured the attention and interest of people from all over the world. From its historical origin to its relevance today, Up tack has been the subject of debate, analysis and study by experts in the field. Various aspects related to Up tack, such as its impact on society, its influence on popular culture and its role in the development of technology, have been the subject of extensive research and reflection. This article seeks to address and delve into the importance and relevance of Up tack, offering a detailed and complete analysis that allows readers to fully understand this fascinating topic.
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The up tack or falsum (⊥, \bot in LaTeX, U+22A5 in Unicode) is a constant symbol used to represent:
- The truth value 'false', or a logical constant denoting a proposition in logic that is always false (often called "falsum" or "absurdum").
- The bottom element in wheel theory and lattice theory, which also represents absurdum when used for logical semantics
- The bottom type in type theory, which is the bottom element in the subtype relation. This may coincide with the empty type, which represents absurdum under the Curry–Howard correspondence
- The "undefined value" in quantum physics interpretations that reject counterfactual definiteness, as in (r0,⊥)
as well as
- Mixed radix decoding in the APL programming language
The glyph of the up tack appears as an upside-down tee symbol, and as such is sometimes called eet (the word "tee" in reverse).[citation needed] Tee plays a complementary or dual role in many of these theories.
The similar-looking perpendicular symbol (⟂, \perp in LaTeX, U+27C2 in Unicode) is a binary relation symbol used to represent:
- Perpendicularity of lines in geometry
- Orthogonality in linear algebra
- Independence of random variables in probability theory
- Coprimality in number theory
The double tack up symbol (⫫, U+2AEB in Unicode) is a binary relation symbol used to represent:
See also
Notes
- ^ a b "Mathematical Operators – Unicode" (PDF). Retrieved 2013-07-20.
- ^ "Conditional independence notation". 27 March 2020.
