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  2. Greek letters used in mathematics, science, and engineering

    en.wikipedia.org/wiki/Greek_letters_used_in...

    the Pi function, i.e. the Gamma function when offset to coincide with the factorial; the complete elliptic integral of the third kind; the fundamental groupoid; osmotic pressure; represents: Archimedes' constant (more commonly just called Pi), the ratio of a circle's circumference to its diameter; the prime-counting function

  3. Time constant - Wikipedia

    en.wikipedia.org/wiki/Time_constant

    In physics and engineering, the time constant, usually denoted by the Greek letter τ (tau), is the parameter characterizing the response to a step input of a first-order, linear time-invariant (LTI) system. [1] [note 1] The time constant is the main characteristic unit of a first-order LTI system. It gives speed of the response.

  4. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    The Greek alphabet has been used to write the Greek language since the late 9th or early 8th century BC. [2] [3] It was derived from the earlier Phoenician alphabet, [4] and is the earliest known alphabetic script to have developed distinct letters for vowels as well as consonants. [5]

  5. RC time constant - Wikipedia

    en.wikipedia.org/wiki/RC_time_constant

    The signal delay of a wire or other circuit, measured as group delay or phase delay or the effective propagation delay of a digital transition, may be dominated by resistive-capacitive effects, depending on the distance and other parameters, or may alternatively be dominated by inductive, wave, and speed of light effects in other realms.

  6. Transcendental number - Wikipedia

    en.wikipedia.org/wiki/Transcendental_number

    () if is algebraic and nonzero, for any branch of the Lambert W Function (by the Lindemann–Weierstrass theorem), in particular the omega constant Ω. W ( r , a ) {\displaystyle W(r,a)} if both a {\displaystyle a} and the order r {\displaystyle r} are algebraic such that a ≠ 0 {\displaystyle a\neq 0} , for any branch of the generalized ...

  7. Pi (letter) - Wikipedia

    en.wikipedia.org/wiki/Pi_(letter)

    Pi (/ˈpaɪ/; Ancient Greek /piː/ or /peî/, uppercase Π, lowercase π, cursive ϖ; Greek: πι) is the sixteenth letter of the Greek alphabet, representing the voiceless bilabial plosive IPA:. In the system of Greek numerals it has a value of 80.

  8. Tau - Wikipedia

    en.wikipedia.org/wiki/Tau

    Tau (/ ˈ t aʊ, ˈ t ɔː, ˈ t ɒ /; [1] uppercase Τ, lowercase τ or ; Greek: ταυ) is the nineteenth letter of the Greek alphabet, representing the voiceless dental or alveolar plosive IPA:. In the system of Greek numerals , it has a value of 300.

  9. Honor cords - Wikipedia

    en.wikipedia.org/wiki/Honor_cords

    Pi Omega Pi: Silver, Royal Blue, and Gold Pi Sigma Alpha: Red, White, and Black Pi Tau Sigma: Red and Blue Pi Theta Epsilon: Navy and Gold Psi Beta: Royal Blue and Gold Psi Chi: Platinum and Dark Blue Rho Chi: Royal Purple and White Rho Lambda: Maroon and Gold S.A.L.U.T.E. Red/Cardinal, White, and Royal Blue Sigma Alpha Lambda: Navy, Black, and ...