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

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

    theta functions; the angle of a scattered photon during a Compton scattering interaction; the angular displacement of a particle rotating about an axis; the Watterson estimator in population genetics; ϑ ("script theta"), the cursive form of theta, often used in handwriting, represents the first Chebyshev function in number theory; Theta role ...

  3. Greek alphabet - Wikipedia

    en.wikipedia.org/wiki/Greek_alphabet

    In Archaic and early Classical times, the Greek alphabet existed in many local variants, but, by the end of the 4th century BC, the Ionic-based Euclidean alphabet, with 24 letters, ordered from alpha to omega, had become standard throughout the Greek-speaking world [6] and is the version that is still used for Greek writing today.

  4. High school fraternities and sororities - Wikipedia

    en.wikipedia.org/wiki/High_school_fraternities...

    Omega Nu (ΩΝ) was founded in 1897 at San Jose High School. The group continues with twelve active chapters as a service organization. [1] Phi Sigma Beta, (ΦΣΒ) was founded in 1910. It became ΤΔΦ - Tau Delta Phi collegiate fraternity. [2] [a] Phi Sigma Chi, (ΦΣΧ) was founded on November 28, 1900, in Zanesville, Ohion. It chartered 117 ...

  5. Christian sororities - Wikipedia

    en.wikipedia.org/wiki/Christian_sororities

    Delta Alpha Omega (aka Devoted to Alpha & Omega) began on November 7, 2009, in Saint Louis, Missouri. Zeta Nu Delta Christian Sorority, Inc. was founded by Besceglia Hall in 2012. Theta Phi Sigma Christian Sorority, Inc., also known as the Pink Society, was founded in 2009 in Montgomery, Alabama, by Jessica Martin.

  6. What do teens mean when they say ‘sigma’? - AOL

    www.aol.com/news/teens-mean-sigma-000158935.html

    Lindsay added, “So they have the ‘alpha’ which is the most successful, the best looking and then they have ‘sigma’ which is the same thing as an alpha but humbler.”

  7. List of DePauw University fraternities and sororities - Wikipedia

    en.wikipedia.org/wiki/List_of_DePauw_University...

    Alpha Chi Omega - ΑΧΏ-Alpha chapter, founded at DePauw in 1885. Alpha Phi - ΑΦ-Gamma chapter, founded at DePauw in 1887; Delta Gamma - ΔΓ-Gamma Iota, founded at DePauw in 1949; Kappa Alpha Theta - ΚΑΘ-Alpha chapter, founded at DePauw in 1870, Theta is the first Greek-letter women's fraternity.

  8. List of Delta Delta Delta chapters - Wikipedia

    en.wikipedia.org/wiki/List_of_Delta_Delta_Delta...

    Phi Alpha: November 18, 1944 University of Toledo: Toledo: Ohio: Active [ca] Theta Omega: May 4, 1946 University of Kansas: Lawrence: Kansas: Active Phi Beta: October 26, 1946 – June 1, 1984; January 2, 1990 – June 30, 2018 University of Arizona: Tucson: Arizona: Inactive [48] [cb] Alpha Phi: January 18, 1947 – December 4, 2009 ...

  9. List of Alpha Delta Pi chapters - Wikipedia

    en.wikipedia.org/wiki/List_of_Alpha_Delta_Pi...

    Alpha Lambda: May 20, 1920 – 1986 University of Oregon: Eugene: Oregon Inactive [5] [ai] Alpha Mu: June 5, 1920 – 1934 University of Wisconsin: Madison: Wisconsin Inactive [5] Alpha Nu: June 16, 1920 – 1982 University of New Mexico: Albuquerque: New Mexico Inactive [5] [aj] Alpha Xi: June 14, 1921 – 2002 Ohio State University: Columbus ...