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Defunct American collegiate Jewish fraternity
Sigma Tau Phi (ΣΤΦ) was a historically Jewish collegiate fraternity. It was founded in 1918 at the University of Pennsylvania as a society for engineering
Sigma_Tau_Phi
American multicultural collegiate fraternity
Tau Phi Sigma (ΤΦΣ) is a multicultural service-oriented college fraternity, founded in 1992 at the campus of the University of Illinois at Urbana-Champaign
Tau_Phi_Sigma
International honor society for philosophers
Phi Sigma Tau (ΦΣΤ, or PST) is an international honor society for philosophers. In addition to providing a means of awarding distinction to students with
Phi_Sigma_Tau
American collegiate sorority
Sigma Delta Tau (ΣΔΤ) is an American sorority and member of the National Panhellenic Conference. Sigma Delta Tau was founded on March 25, 1917, at Cornell
Sigma_Delta_Tau
Phi Beta Sigma (ΦΒΣ) is an international historically Black fraternity. Founded on January 9, 1914, on the campus of Howard University in Washington, D
List of Phi Beta Sigma chapters
List_of_Phi_Beta_Sigma_chapters
Filipino college fraternity
Triskelions. Tau Gamma Phi is one of the largest fraternities in the Philippines in terms of membership. It has a sister sorority, Tau Gamma Sigma (ΤΓΣ), also
Tau_Gamma_Phi
American Jewish collegiate fraternity
least more than sixty chapters. Phi Sigma Delta merged with Zeta Beta Tau in 1970, retiring its original name. Phi Sigma Delta was founded at Columbia University
Phi_Sigma_Delta
faith tradition. It absorbed the Jewish fraternities Sigma Omega Psi in 1940 and Sigma Tau Phi in 1947. Naming convention has varied significantly over
List of Alpha Epsilon Pi chapters
List_of_Alpha_Epsilon_Pi_chapters
International collegiate fraternity
national fraternities merged with Pi Lambda Phi: Phi Beta Delta, Beta Sigma Tau and Beta Sigma Rho. Phi Beta Delta was founded at Columbia University
Pi_Lambda_Phi
American collegiate fraternity
The Sigma Phi Society (ΣΦ) is an American college fraternity. Established in 1827 at Union College in Schenectady, New York, it was the second Greek letter
Sigma_Phi
American collegiate social fraternity
Phi Sigma Phi (ΦΣΦ) (Phi Sig) is a national fraternity in the United States founded on July 30, 1988 in South Bend, Indiana by chapters formerly of Phi
Phi_Sigma_Phi
Filipino college sorority
fraternity counterpart is Tau Gamma Phi (ΤΓΦ) also known as the Triskelions' Grand Fraternity. On January 17, 1969, Tau Gamma Sigma was founded by ten women
Tau_Gamma_Sigma
Phi Sigma Kappa is a men's social and academic fraternity with approximately 65 active chapters and provisional chapters in North America. Interest groups
List of Phi Sigma Kappa chapters
List_of_Phi_Sigma_Kappa_chapters
International honor society for food science and technology
Phi Tau Sigma (ΦΤΣ) is an international honor society for food science and technology. It was founded in 1953 at the University of Massachusetts Amherst
Phi_Tau_Sigma
Zeta Beta Tau is a North American fraternity established on December 29, 1898. It absorbed Phi Sigma Delta fraternity in 1969 and Phi Epsilon Pi fraternity
List of Zeta Beta Tau chapters
List_of_Zeta_Beta_Tau_chapters
North American collegiate fraternity
Phi Kappa Tau (ΦΚΤ), commonly known as Phi Tau (/faɪ tɔː/), is a collegiate fraternity located in the United States. The fraternity was founded in 1906
Phi_Kappa_Tau
Three-dimensional orthogonal coordinate system
{\sinh \tau }{\cosh \tau -\cos \sigma }}\sin \phi } z = a sin σ cosh τ − cos σ {\displaystyle z=a\ {\frac {\sin \sigma }{\cosh \tau -\cos \sigma }}}
Toroidal_coordinates
Tau Epsilon Phi is a social collegiate fraternity founded at Columbia University in 1910. In the following is lislt, active chapters are indicated in
List of Tau Epsilon Phi chapters
List_of_Tau_Epsilon_Phi_chapters
the Great Depression (Alpha Sigma Phi, Alpha Tau Omega, Lambda Chi Alpha, and Sigma Alpha Mu), and two (Phi Kappa Sigma and Alpha Chi Rho) merged to
Dartmouth College fraternities and sororities
Dartmouth_College_fraternities_and_sororities
North American collegiate fraternity
he approached Tau Phi Delta members, claiming to represent a historic fraternity called Sigma Pi that dated to the 18th century. Tau Phi Delta accepted
Sigma_Pi
Alpha Tau Omega and dispersed to multiple fraternities Merged with Alpha Sigma Phi and dispersed to multiple fraternities. Merged with Alpha Sigma Phi. Merged
List_of_social_fraternities
originated as Epsilon Sigma Phi (local) in 1966. This chapter originated as Chi Sigma Phi (local) in 1966. This chapter originated as Tau Omega Pi (local)
List_of_Phi_Mu_chapters
North American collegiate fraternity
Tau Epsilon Phi (ΤΕΦ), commonly known as TEP or T E Phi, is an American collegiate social fraternity that was founded at Columbia University in 1910.
Tau_Epsilon_Phi
Phi Omega Pi. Baldwin-Wallace's reorganized as the local, Theta Tau Delta, then affiliated with Phi Mu. The following are its known chapters of Sigma
Defunct North American collegiate sororities
Defunct_North_American_collegiate_sororities
formed from Phi Chi (local), established in 1920. Chapter formed from Pi Sigma Delta, established in 1920. Chapter formed from Alpha Tau Delta, established
List of Delta Sigma Pi chapters
List_of_Delta_Sigma_Pi_chapters
Trade association of collegiate men's fraternities
Sigma Phi, Alpha Tau Omega, Kappa Alpha Order, and Theta Chi - established the Fraternity Forward Coalition (FFC). Alpha Epsilon Pi, Alpha Sigma Phi,
North American Interfraternity Conference
North_American_Interfraternity_Conference
American collegiate sorority
Alpha Sigma Tau (known as ΑΣΤ or Alpha Tau) is an American collegiate sorority founded 1899, at Eastern Michigan University (formerly Michigan State Normal
Alpha_Sigma_Tau
fraternal counterpart is Tau Gamma Phi. Also known as the Triskelions' Grand Sorority. Its sister organization is Tau Gamma Sigma. Also known as the Triskelions’
List of fraternities and sororities in the Philippines
List_of_fraternities_and_sororities_in_the_Philippines
established in 1919. Chapter absorbed the Phi Chapter of Theta Tau in 2024 Chapter formed from Tau Alpha Sigma, established in 1919. Chapter formed from
List of Phi Kappa Tau chapters
List_of_Phi_Kappa_Tau_chapters
19, 2023. "Eta Sigma Chapter". Alpha Phi Alpha Fraternity, Inc. Zeta Sigma Lambda Chapter. Retrieved April 22, 2023. "Eta Tau". Alpha Phi Alpha Fraternity
List of Alpha Phi Alpha chapters
List_of_Alpha_Phi_Alpha_chapters
membership of Sigma Mu Sigma in 1934 during the Great Depression. Chapter originated as Phi Beta Chi (local) in 1921. Chapter originated as Tau Sigma Rho (local)
List of Tau Kappa Epsilon chapters
List_of_Tau_Kappa_Epsilon_chapters
Co-ed fraternity at Dartmouth College
Phi Tau (ΦΤ) is a coeducational fraternity at Dartmouth College in Hanover, New Hampshire. Founded in 1905 as the Tau chapter of Phi Sigma Kappa, the organization
Phi_Tau
formed from Delta Sigma Delta, established in 1919. Chapter formed from Tau Gamma Phi, established in 1915. Chapter formed from Alpha Tau, established in
List of Delta Tau Delta chapters
List_of_Delta_Tau_Delta_chapters
Phi Sigma Delta was a collegiate fraternity established in 1909 with a predominantly Jewish membership. It merged into Zeta Beta Tau in 1969. Following
List of Phi Sigma Delta chapters
List_of_Phi_Sigma_Delta_chapters
absorbing Gamma Phi, established in 1920. Chapter closed due to the American Civil War. Reformed in 1996 by absorbing Rho Sigma Tau (local), established
List_of_Chi_Phi_chapters
North American collegiate fraternity
Phi Sigma Kappa (ΦΣΚ), colloquially known as Phi Sig or PSK, is a men's social and academic fraternity with approximately 74 active chapters and provisional
Phi_Sigma_Kappa
Chapter of Omega Psi Phi Fraternity, Inc. Retrieved June 14, 2025. "Sigma Xi – Chapter History". Sigma Xi Chapter Omega Psi Phi. April 12, 2018. Retrieved
List of Omega Psi Phi chapters
List_of_Omega_Psi_Phi_chapters
American collegiate fraternity 1910–1985
its merger with the Phi Sigma Kappa (ΦΣΚ) fraternity. In 1985, most Phi Sigma Epsilon chapters participated in the merger. Phi Sigma Kappa incorporated
Phi_Sigma_Epsilon
as Sigma Tau Upsilon Chi (local) in 1918. Alpha Eta chapter originated as Sigma Omega Sigma (local) in 1918. Alpha Theta chapter originated as Phi Zeta
List of Zeta Tau Alpha chapters
List_of_Zeta_Tau_Alpha_chapters
Result due to Kummer on cyclic extensions of fields that leads to Kummer theory
(d^{0}(b))(\sigma )=b/b^{\sigma },\quad {\text{ and }}\quad (d^{1}(\phi ))(\sigma ,\tau )\,=\,\phi (\sigma )\phi (\tau )^{\sigma }/\phi (\sigma \tau ),} where
Hilbert's_Theorem_90
American fraternal organization
name is "A Brotherhood of Kappa Nu, Phi Alpha, Phi Epsilon Pi, Phi Sigma Delta, and Zeta Beta Tau". Zeta Beta Tau abolished the institution of pledging
Zeta_Beta_Tau
Chapter formed from Phi Mu Delta, established in 1921. Chapter formed from Tau Omega, established in 1940. Chapter formed from Alpha Sigma Delta, established
List of Alpha Tau Omega chapters
List_of_Alpha_Tau_Omega_chapters
Phi Epsilon (local), established in 1925. Chapter formed from Delta Tau (local), established in 1925. After going dormant, it reformed from Phi Sigma
List of Delta Phi Epsilon (social) chapters
List_of_Delta_Phi_Epsilon_(social)_chapters
"Zeta Phi Beta Sorority, Inc. Rho Sigma Zeta Chapter". Zeta Phi Beta Sorority, Inc. Rho Sigma Zeta Chapter. Retrieved March 8, 2023. "Beta Tau Zeta Chapter"
List of Zeta Phi Beta chapters
List_of_Zeta_Phi_Beta_chapters
Social fraternity at Chico State University, California
chapter of Delta Sigma Phi in 1956, separated from Delta Sigma Phi in 2001 to become a local fraternity, and went inactive in 2005. Chi Tau was founded as
Chi_Tau_(local)
formed from Sigma Nu Association, established in 1903. Chapter formed from Gamma Tau (local), established in 1904. Chapter formed from Kappa Phi Beta (local)
List_of_Sigma_Nu_chapters
Function studied by Ramanujan
_{n=1}^{\infty }\tau (n)q^{n}=q\prod _{n=1}^{\infty }(1-q^{n})^{24}=q\phi (q)^{24}=\eta (z)^{24}=\Delta (z),} where ϕ {\displaystyle \phi } is the Euler
Ramanujan_tau_function
American collegiate fraternity (1948–1960)
merging with Pi Lambda Phi fraternity in 1960. Stanley Tolliver of Baldwin Wallace College was the founder of Beta Sigma Tau. In May 1948, he called
Beta_Sigma_Tau
after the war, the chapter remained inactive. The chapter formed from Phi Tau Sigma (local), established in 1946. Chapter formed from Ero Sophian (local)
List_of_Alpha_Phi_chapters
(December 14, 2023). "Kappa Sigma reestablishes the Pi-Tau Chapter at New Mexico Institute of Mining and Technology". Kappa Sigma Fraternity. Retrieved December
List_of_Kappa_Sigma_chapters
Phi Kappa Sigma is an American men's general collegiate fraternity. Following is a List of chapters of Phi Kappa Sigma. In the first decades, several names
List of Phi Kappa Sigma chapters
List_of_Phi_Kappa_Sigma_chapters
Phi Sigma Tau is an international honor society for philosophers. In the following list, active chapters are indicated in bold and inactive chapters are
List of Phi Sigma Tau chapters
List_of_Phi_Sigma_Tau_chapters
chapter of Phi Sigma Kappa with the national merger. Chapter formed from Pi Sigma Epsilon, established in 1912. Chapter formed from Sigma Delta Tau, established
List of Phi Sigma Epsilon chapters
List_of_Phi_Sigma_Epsilon_chapters
Nineteenth letter in the Greek alphabet
Law - Sigma vs. Tau, in the Court of the Seven Vowels, contains a reference to the cross attribution. Sigma petitions the court to sentence Tau to death
Tau
Sigma Chapter of Sigma Gamma Rho Sorority, Inc". Omicron Sigma Chapter of Sigma Gamma Rho Sorority, Inc. Retrieved May 3, 2023. "Undergraduates". Tau
List of Sigma Gamma Rho chapters
List_of_Sigma_Gamma_Rho_chapters
Sigma Pi is a collegiate fraternity in North America. It was founded as Tau Phi Delta at Vincennes University on February 26, 1897. In 1907, the fraternity
List_of_Sigma_Pi_chapters
Co-educational service sorority
Tau Beta Sigma Honorary Band Sorority (ΤΒΣ, colloquially referred to as TBSigma or TBS) is a co-educational recognition and service sorority for collegiate
Tau_Beta_Sigma
Delta Sigma Phi is a fraternity founded in 1899 at City College of New York. It was the first fraternity based on religious and ethnic acceptance. The
List of Delta Sigma Phi chapters
List_of_Delta_Sigma_Phi_chapters
formed from Kappa Phi Delta, established in 1921. Chapter formed from Pi Tau Sigma, established in 1929. Chapter formed from Sigma Alpha, established
List of Sigma Alpha Mu chapters
List_of_Sigma_Alpha_Mu_chapters
Daketh Sigma, established in 1895. Revived a Zeta Beta Tau chapter with the national merger of the two fraternities. Chapter formed in Delta Phi Delta
List of Phi Epsilon Pi chapters
List_of_Phi_Epsilon_Pi_chapters
Organization North American sororities
NPC members (Alpha Phi, Alpha Chi Omega, Phi Mu, Alpha Gamma Delta, Sigma Delta Tau, Delta Phi Epsilon, Delta Gamma, and Gamma Phi Beta) broke ranks from
National Panhellenic Conference
National_Panhellenic_Conference
Gamma Sigma (local), formed in 1928. This chapter had its origin in Gamma Pi Chi (local), formed in 1928. This chapter had its origin in Phi Sigma Tau (local)
List of Sigma Sigma Sigma chapters
List_of_Sigma_Sigma_Sigma_chapters
Sigma Phi Epsilon is an American social college fraternity. It was founded on November 1, 1901, at Richmond College, which is now the University of Richmond
List of Sigma Phi Epsilon chapters
List_of_Sigma_Phi_Epsilon_chapters
North American collegiate fraternity
Alpha Sigma Phi (ΑΣΦ), commonly known as A Sig, is an intercollegiate men's social fraternity. Founded in 1845 at Yale University in New Haven, Connecticut
Alpha_Sigma_Phi
Sigma Phi is an international intercollegiate men's social fraternity that was established at Yale University in 1845. It absorbed 4 chapters of Phi Phi
List of Alpha Sigma Phi chapters
List_of_Alpha_Sigma_Phi_chapters
Defunct American collegiate Jewish fraternity
Phi Alpha (ΦΑ) was an American historically Jewish fraternity founded in 1914. It merged with Phi Sigma Delta in 1959. It was a member of the National
Phi_Alpha_(fraternity)
North American collegiate fraternity
Tau Delta Phi (ΤΔΦ), whose members are commonly known as Tau Delts, is a national social fraternity founded on June 22, 1910, in New York City. Since its
Tau_Delta_Phi
italics. Pi Lambda Phi assigned names to chapters that were defunct at the time of its mergers with Beta Sigma Rho, Beta Sigma Tau, and Phi Beta Delta. Unless
List of Pi Lambda Phi chapters
List_of_Pi_Lambda_Phi_chapters
American collegiate fraternity
founded at the City College of New York, the others being Delta Sigma Phi and Zeta Beta Tau. In the fall of 1909, the sophomore class at the College of the
Sigma_Alpha_Mu
Probability distribution
{1}{2}}(n\tau +\tau _{0})\left(\mu -{\dfrac {n\tau {\bar {x}}+\tau _{0}\mu _{0}}{n\tau +\tau _{0}}}\right)^{2}+{\frac {n\tau \tau _{0}}{n\tau +\tau _{0}}}({\bar
Normal_distribution
American Christian sorority
Sigma Phi Lambda (ΣΦΛ), also known as Sisters for the Lord or Phi Lamb, is a Christian sorority founded in 1988 in Austin, Texas. Sigma Phi Lambda was
Sigma_Phi_Lambda
American medical fraternity
Phi Rho Sigma Society (ΦΡΣ) is a co-educational medical fraternity founded by medical students at Northwestern University in 1890. Phi Rho Sigma Medical
Phi_Rho_Sigma
American secondary student organizations
Omega Eta Tau, formed in 1859 as Torch and Dagger in Council Bluffs, Iowa, is the first known high school fraternity. It was followed by Gamma Sigma, Alpha
High school fraternities and sororities
High_school_fraternities_and_sororities
Sigma Tau Delta (local), established in 1922. It was restored as a colony in 1982 and 2011. Texas Theta was re-established in 1977 by absorbing Phi Kappa
List of Sigma Alpha Epsilon chapters
List_of_Sigma_Alpha_Epsilon_chapters
becoming Beta Sigma Rho. Merged with Pi Lambda Phi in 1920. Merged with Pi Tau Pi. Merged with Phi Epsilon Pi in 1961. Merged with Tau Delta Phi in 1934. Merged
List of Jewish fraternities and sororities
List_of_Jewish_fraternities_and_sororities
forming its first three collegiate chapters. Later, Phi Sigma Beta changed its name to Tau Delta Phi. Beta chapter consolidated into Gamma chapter. Gamma
List of Tau Delta Phi chapters
List_of_Tau_Delta_Phi_chapters
Two-dimensional orthogonal coordinate system
\nabla ^{2}\Phi ={\frac {1}{\sigma ^{2}+\tau ^{2}}}\left[{\frac {1}{\sigma }}{\frac {\partial }{\partial \sigma }}\left(\sigma {\frac {\partial \Phi }{\partial
Parabolic_coordinates
American religious fraternity (1925–1941)
Phi Tau Theta (ΦΤΘ) was an American religious fraternity for Methodist men. It was established in 1925 and had chapters, mostly in the midwest. Through
Phi_Tau_Theta
originated as Tau Kappa Sigma (local) in 1905. This chapter originated as the Alpha chapter of Phi Mu Gamma in 1898. This chapter originated as Tau Upsilon
List of Gamma Phi Beta chapters
List_of_Gamma_Phi_Beta_chapters
American collegiate fraternity (1915–1939)
Phi Pi Phi (ΦΠΦ) was a social fraternity founded at Northwestern University in 1915. It merged with Alpha Sigma Phi in 1939. Phi Pi Phi was founded on
Phi_Pi_Phi
as a colony in 2002. Chapter formed from Tau Kappa Phi, established in 1920. Chapter formed from Gamma Sigma, established in 1923. Chapter formed from
List_of_Pi_Kappa_Phi_chapters
American Jewish fraternity (1910–1972)
Sigma Rho (ΒΣΡ) was an American social fraternity founded at Cornell University in 1910. Most of its active chapters were absorbed into Pi Lambda Phi
Beta_Sigma_Rho
from Phi Lambda Sigma (local), established in 1925. Chapter formed from Tau Phi (local), established in 1921. Chapter formed from Gamma Sigma Phi (local)
List of Alpha Sigma Tau chapters
List_of_Alpha_Sigma_Tau_chapters
American college fraternity (1921–2020)
students. As a national fraternity, Sigma Mu Sigma dissolved in 1935 when it was absorbed by Tau Kappa Epsilon. Sigma Mu Sigma was later revived, developed another
Sigma_Mu_Sigma
American Jewish collegiate sorority
University of Wisconsin–Madison (Sigma) Washington University in St. Louis (Psi) Wayne State University (Phi Sigma) Alpha Epsilon Phi also has many inactive chapters
Alpha_Epsilon_Phi
Bachelors Club, established in 1913 Formed from Phi Sigma Tau, established in 1908. Formed from Gamma Tau Delta, established in 1921. Formed from Owl &
List of Phi Gamma Delta chapters
List_of_Phi_Gamma_Delta_chapters
1842, Delta Tau Delta in 1861 at both Jefferson and Washington Colleges, Phi Kappa Sigma in 1854, Phi Delta Theta in 1875, and Alpha Tau Omega in 1882
Washington & Jefferson College fraternities and sororities
Washington_&_Jefferson_College_fraternities_and_sororities
formed from Sigma Lambda Chi Iota, established in 1923. Chapter formed from Phi Lambda Mu, established in 1920. Chapter formed from Sigma Tau Alpha, established
List of Phi Sigma Sigma chapters
List_of_Phi_Sigma_Sigma_chapters
Three-dimensional coordinate system
{\displaystyle (\sigma ,\tau ,\phi )} are sometimes used, where σ = cosh μ {\displaystyle \sigma =\cosh \mu } and τ = cos ν {\displaystyle \tau =\cos \nu
Prolate spheroidal coordinates
Prolate_spheroidal_coordinates
North American collegiate fraternity
Sigma Tau Gamma (ΣΤΓ), commonly known as Sig Tau, is a United States college social fraternity founded on June 28, 1920, at the University of Central Missouri
Sigma_Tau_Gamma
American LGBT collegiate fraternity
University in 2003. Sigma Phi Beta originated as the Beta chapter of a now-defunct fraternity with similar values, Alpha Lambda Tau at Arizona State University
Sigma_Phi_Beta_(fraternity)
Christian cross in the shape of a capital T
of non-Christian Lucian (125 – after 180), the Greek letter Sigma (Σ) accuses the letter Tau (Τ) of having provided tyrants with the model for the wooden
Tau_cross
Formula for the direction of slip of a stressed crystalline material
{\displaystyle \tau } ) is given by τ = σ cos ϕ cos λ {\displaystyle \tau =\sigma \cos \phi \cos \lambda } , where σ {\displaystyle \sigma } is the magnitude
Schmid's_law
Sigma Tau Delta is an international honor society for students of English at four-year colleges and universities. It was founded on December 12, 1922
List of Sigma Tau Delta chapters
List_of_Sigma_Tau_Delta_chapters
International collegiate fraternity
as a result of the war. In 1940, Sigma Omega Psi joined Alpha Epsilon Pi adding three chapters, as did Sigma Tau Phi in 1947. The next two decades were
Alpha_Epsilon_Pi
Topics referred to by the same term
Phi Sigma Beta (ΦΣΒ) may refer to: Phi Sigma Beta (Puerto Rico), a former country district of Phi Sigma Alpha fraternity Tau Delta Phi, a Jewish high school
Phi_Sigma_Beta
American collegiate honor society
Tau Sigma (ΤΣ) is an American honor society for university transfer students. It was established at Auburn University in 1999 and has spread to include
Tau_Sigma
Organization that regulates collegiate honor societies
organizations: Alpha Omega Alpha, the Order of the Coif, Phi Beta Kappa, Phi Kappa Phi, Sigma Xi, and Tau Beta Pi. The Association of College Honor Societies
Association of College Honor Societies
Association_of_College_Honor_Societies
formed from Sigma Tau, established in 1903. Chapter formed from Rho Sigma Gamma, established in 1909. Chapter formed from Phi Delta Sigma, established
List_of_Sigma_Chi_chapters
Sigma Pi Delta (local), established in 1924. Chapter originated as Gamma Sigma Alpha (local), established in 1941. Chapter originated as Phi Tau Phi (local)
List of Alpha Sigma Alpha chapters
List_of_Alpha_Sigma_Alpha_chapters
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