This section needs additional citations for verification. Please help improve this article by adding citations to reliable sources. Unsourced material may be challenged and removed.Find sources: "Up tack" – news · newspapers · books · scholar · JSTOR (May 2014) (Learn how and when to remove this template message)

The up tack or falsum (, \bot in LaTeX, U+22A5 in Unicode[1]) is a constant symbol used to represent:

as well as

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:

The double tack up symbol (, U+2AEB in Unicode[2]) is a constant symbol used to represent:

See also


  1. ^ "Mathematical Operators – Unicode" (PDF). Retrieved 2013-07-20.
  2. ^ "Mathematical Operators – Unicode" (PDF). Retrieved 2013-07-20.
  3. ^ "Conditional independence notation". 27 March 2020.