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American law fraternity (1902–1989)
Sigma Nu Phi (ΣΝΦ), also known as Adelphia Sigma Nu Phi, was a professional law fraternity and a member of the Professional Fraternity Association. Adelphia
Sigma_Nu_Phi
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
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
American collegiate Native American fraternity
Phi Sigma Nu (ΦΣΝ) is the oldest and largest Native American fraternity in the United States. It was founded in 1996 in North Carolina. Phi Sigma Nu is
Phi_Sigma_Nu
North American collegiate sorority
Phi Sigma Sigma (ΦΣΣ), colloquially known as Phi Sig, was the first collegiate nonsectarian sorority to allow membership of women of all faiths and backgrounds
Phi_Sigma_Sigma
graduate chapter, Phi Nu expanded and added on an undergraduate attachment at West Point in 1994. The first graduate chapter of Omega Psi Phi was chartered
List of Omega Psi Phi chapters
List_of_Omega_Psi_Phi_chapters
International historically Black American collegiate fraternity
Phi Beta Sigma Fraternity, Inc. (ΦΒΣ) is a historically African American fraternity. It was founded at Howard University in Washington, D.C. in 1914. The
Phi_Beta_Sigma
Theta Sigma Chi (local) in 1907. This chapter originated as Phi Alpha (local) which had formed earlier in 1912. This chapter originated as Phi Theta Nu (local)
List_of_Phi_Mu_chapters
return of the Sigma Chapter at Tulane University!". Kappa Sigma Fraternity. Retrieved December 6, 2025. "Closure of the Nu Chapter of Kappa Sigma Effective
List_of_Kappa_Sigma_chapters
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
Phi Sigma Epsilon was a North American social fraternity was founded on February 20, 1910, at Kansas State Normal College, now Emporia State University
List of Phi Sigma Epsilon chapters
List_of_Phi_Sigma_Epsilon_chapters
American collegiate sorority
State Normal College at the time: Pi Kappa Sigma (merged into Sigma Kappa), Sigma Nu Phi (local), and Zeta Phi (local, inactive). Effie E. Polyhamus Lyman
Alpha_Sigma_Tau
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
Sigma Pi Phi is an African American professional fraternity. Founded in Philadelphia, Pennsylvania, in 1904, it is the oldest Greek lettered fraternity
List_of_Sigma_Pi_Phi_chapters
Chapter formed from Phi Beta Chi, established in 1957. Chapter formed from Delta Sigma, established in 1958. Chapter formed from Beta Alpha Nu, established in
List of Delta Sigma Pi chapters
List_of_Delta_Sigma_Pi_chapters
by absorbing the Oasis Club (local), 1926. Chapter formed by absorbing Phi Sigma Lambda (local). Chapter formed by absorbing the West Hall Collegiate Club
List of Alpha Phi Alpha chapters
List_of_Alpha_Phi_Alpha_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
North American general sorority
Beta Sigma Phi International (ΒΣΦ) is an international noncollegiate sorority. Founded in Abilene Kansas, in 1931 by Walter W. Ross "for the social, cultural
Beta_Sigma_Phi
Wheeler) on October 17, 1923. Lessinoff was made an honorary member of Sigma Nu Phi in 1922. In 1912, Lessinoff entered the Foreign Office at Sofia as an
Paul_Lessinoff
American collegiate social fraternity
Phi Sigma Nu (ΦΣΝ) was an American junior college social fraternity. It was founded in 1927 at Crane Junior College in Chicago, Illinois. It established
Phi Sigma Nu (junior fraternity)
Phi_Sigma_Nu_(junior_fraternity)
Zeta Psi, Kappa Kappa Kappa, Phi Sigma Kappa, Sigma Nu, Sigma Alpha Epsilon, Chi Phi, Theta Delta Chi, Phi Gamma Delta, Sigma Chi, and Gamma Delta Chi. It
Dartmouth College fraternities and sororities
Dartmouth_College_fraternities_and_sororities
original charter dates, rather than the merger date. Delta Theta Phi merged with Sigma Nu Phi in 1989. Following is an incomplete list of the fraternity's
List of Delta Theta Phi chapters
List_of_Delta_Theta_Phi_chapters
American association of national, collegiate, professional fraternities and sororities
Gamma, Phi Alpha Delta, Phi Beta Gamma, Sigma Nu Phi Medicine: Omega Upsilon Phi, Phi Beta Pi, Phi Rho Sigma, Theta Kappa Psi Pharmacy: Kappa Psi, Phi Delta
Professional Fraternity Association
Professional_Fraternity_Association
Sigma Sigma. Chapter closed when it became the graduate chapter, Alpha Upsilon Sigma of East Saint Louis, Illinois. Chapter was reestablished as Nu Psi
List of Sigma Gamma Rho chapters
List_of_Sigma_Gamma_Rho_chapters
American collegiate fraternity
Delta Sigma Phi (ΔΣΦ), commonly known as Delta Sig, is a fraternity established in 1899 at The City College of New York (CCNY). It was the first fraternity
Delta_Sigma_Phi
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
established in 1985. Chapter formed from Nu Tau Sigma, established in 1965. Chapters formed from Sigma Phi Beta, established in 1966. Chapter formed
List of Sigma Alpha Mu chapters
List_of_Sigma_Alpha_Mu_chapters
established in 1982. Chapter formed from Kappa Phi Delta (local), established in 1982. It also absorbed Sigma Beta Nu. Chapter formed from Alpha Chi Rho Little
List of Delta Phi Epsilon (social) chapters
List_of_Delta_Phi_Epsilon_(social)_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
"History | Zeta Phi Beta Sorority, Inc | Nu Sigma Zeta". Retrieved March 8, 2023. "History". Zeta Phi Beta Sorority, Incorporated Omicron Sigma Zeta Chapter
List of Zeta Phi Beta chapters
List_of_Zeta_Phi_Beta_chapters
established in 1953. Chapter formed from Sigma Kappa Nu, established in 1933. Chapter formed from Delta Pi Phi, established in 1947. Chapters formed from
List_of_Pi_Kappa_Phi_chapters
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
Puerto Rican collegiate fraternity
Nu Sigma Beta Fraternity (ΝΣΒ) is a Puerto Rican fraternity. It was established in 1937 at the University of Puerto Rico by 10 students from diverse backgrounds
Nu_Sigma_Beta
Field theory of a point particle confined to move on a fixed manifold
field space Φ {\displaystyle \Phi } can be chosen to be any Riemannian manifold. Historically, this is the "sigma" of the sigma model; the historically-appropriate
Sigma_model
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 professional journalism fraternity (1909–1996)
Theta Sigma Phi (ΘΣΦ) was an American honor society and professional fraternity for women in journalism. It was established in 1909 at the University
Theta_Sigma_Phi
established in 1915. Chapter formed from Alpha Sigma, established in 1914. Chapter formed from Phi Beta Nu, established in 1917. Chapter formed from Delta
List of Phi Kappa Tau chapters
List_of_Phi_Kappa_Tau_chapters
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
multiple fraternities. Merged with Phi Iota Alpha. Merged with Phi Epsilon Pi. Formerly a member of NIC. Merged with Phi Sigma and dispersed to multiple fraternities
List_of_social_fraternities
Phi Sigma Sigma is a collegiate nonsectarian sorority in North America. In the following list, active chapters are indicated in bold and inactive chapters
List of Phi Sigma Sigma chapters
List_of_Phi_Sigma_Sigma_chapters
Professional law fraternity
Phi merged with Sigma Nu Phi in 1989, taking all of Sigma Nu Phi members into membership and gaining The Adelphia Law Journal, giving Delta Theta Phi
Delta_Theta_Phi
Probability distribution
Greek letter phi, Φ {\displaystyle \Phi } . The normal distribution is often referred to as N ( μ , σ 2 ) {\textstyle N(\mu ,\sigma ^{2})} or N
Normal_distribution
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
fraternity established on December 29, 1898. It absorbed Phi Sigma Delta fraternity in 1969 and Phi Epsilon Pi fraternity in 1970. It has both collegiate
List of Zeta Beta Tau chapters
List_of_Zeta_Beta_Tau_chapters
Filipino collegiate service fraternity
Sigma Phi Philippines, Inc. (ΑΣΦ, commonly known as Alphans) is a co-ed college service fraternity with 4 active undergraduate chapters. Alpha Sigma Phi
Alpha_Sigma_Phi_(Philippines)
Phi Gamma Nu is a co-ed collegiate business fraternity. In the following list of chapters, active chapters are indicated in bold and inactive chapters
List_of_Phi_Gamma_Nu_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
Chapter formed from Gamma Nu Sigma (local), established in 1897. Chapter formed from Delta Phi (local) in 1899. Chapter formed from Phi Tau (local), established
List of Phi Delta Theta chapters
List_of_Phi_Delta_Theta_chapters
Sigma Nu is an American college fraternity founded at the Virginia Military Institute in 1869. In the following list, active chapters are indicated in
List_of_Sigma_Nu_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
from Sigma Tau (local), established in 1966. Chapter formed from Kappa Alpha Tau (local), established in 1968. This colony was formed from Phi Gamma Nu (local)
List of Alpha Sigma Tau chapters
List_of_Alpha_Sigma_Tau_chapters
Field-equations in general relativity
_{\sigma \beta }^{\mu }\Gamma _{\gamma \alpha }^{\sigma }-\Gamma _{\sigma \gamma }^{\mu }\Gamma _{\beta \alpha }^{\sigma }\right)\\[6pt]G_{\mu \nu }&=[S3]\times
Einstein_field_equations
North American collegiate fraternity
headquartered, at Miami University in Oxford, Ohio. Phi Delta Theta, along with Beta Theta Pi and Sigma Chi form the Miami Triad. The fraternity has over
Phi_Delta_Theta
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
absorbing Sigma Tau (local), established in 1938. Chapter formed by absorbing Theta Nu, established in 1924. Chapter formed by absorbing Beta Tau Sigma, established
List of Sigma Delta Tau chapters
List_of_Sigma_Delta_Tau_chapters
established as Sigma Gamma Phi in 1957. The sorority was originally chartered as Sigma Lambda Sigma in 1955. The sorority formed as Kappa Phi Omega in 1964
List of Alpha Phi Omega (Philippines) chapters
List_of_Alpha_Phi_Omega_(Philippines)_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
the 1860s. Formed by absorbing Xi Beta Phi (local). Chapter's charter revoked. Became the Beta Nu chapter of Sigma Chi in 1914. Revived in 1890 by absorbing
List_of_Chi_Phi_chapters
Later, it withdrew and became Nu Delta Sigma (local), before joining Alpha Gamma Delta. Chapter formed from Sigma Phi Omega, established in 1928. It
List of Delta Sigma Epsilon chapters
List_of_Delta_Sigma_Epsilon_chapters
American collegiate fraternity (1924–1939)
Kappa Phi at Oklahoma City University Phi Alpha Sigma at Drury College Phi Beta Omega at Baker University Phi Kappa Nu at Howard College Phi Sigma at Gettysburg
Theta_Kappa_Nu
Phi Kappa Sigma is an international all-male college secret society and social fraternity. It is one of the world's oldest fraternities, developing generations
List of Phi Kappa Sigma members
List_of_Phi_Kappa_Sigma_members
Three-dimensional orthogonal coordinate system
}{\cosh \tau -\cos \sigma }}\sin \phi } z = a sin σ cosh τ − cos σ {\displaystyle z=a\ {\frac {\sin \sigma }{\cosh \tau -\cos \sigma }}} together with
Toroidal_coordinates
absorbing Nu Kappa Sigma, established in 1927. Chapter was formed by absorbing Phi Alpha, established in 1947. Chapter was formed by absorbing Phi Kappa Iota
List of Sigma Alpha Epsilon chapters
List_of_Sigma_Alpha_Epsilon_chapters
Miami University in Oxford, Ohio. The sorority absorbed Beta Phi Alpha in 1941, Delta Sigma Epsilon in 1956, and Theta Upsilon in 1962. In the following
List_of_Delta_Zeta_chapters
from Sigma Tau Phi, established in 1915. Chapter formed from Sigma Sigma, established in 1960. Chapter formed from the national merger with Kappa Nu fraternity;
List of Phi Epsilon Pi chapters
List_of_Phi_Epsilon_Pi_chapters
Nu Sigma Nu Medical Fraternity was a North American co-ed professional fraternity for medical students and related sciences. The national entity ceased
List_of_Nu_Sigma_Nu_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)
called Gamma Sigma, the Georgian Society. Later, the national started a new chapter called the Alpha Phi chapter. Chapter formed from Nu Kappa Omega,
List of Tau Epsilon Phi chapters
List_of_Tau_Epsilon_Phi_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
2D coordinate system whose coordinate lines are confocal ellipses and hyperbolae
^{2}\Phi &={\frac {1}{a^{2}\left(\sinh ^{2}\mu +\sin ^{2}\nu \right)}}\left({\frac {\partial ^{2}\Phi }{\partial \mu ^{2}}}+{\frac {\partial ^{2}\Phi }{\partial
Elliptic_coordinate_system
Defunct American collegiate fraternity
Sigma Phi Sigma (ΣΦΣ) was an American national collegiate fraternity founded in 1908 at the University of Pennsylvania. It ceased operations during WWII
Sigma_Phi_Sigma
Ten-dimensional supergravity
{\displaystyle \Psi _{4}^{\mu \nu \rho \sigma }={\tfrac {1}{2}}e^{-\phi }{\bar {\psi }}^{\alpha }\gamma _{[\alpha }\gamma ^{\mu \nu \rho \sigma }\gamma _{\beta ]}\psi
Type_IIA_supergravity
American Jewish collegiate sorority
(Rho) Rowan University (Phi Kappa) State University of New York at New Paltz (Phi Phi) State University of New York at Oswego (Phi Nu) State University of
Alpha_Epsilon_Phi
Phi Beta Sigma is a historically African American fraternity that was founded at Howard University in Washington, D.C. in 1914. The fraternity's membership
List of Phi Beta Sigma members
List_of_Phi_Beta_Sigma_members
Beta Sigma Phi is an international noncollegiate sorority. It was established on April 30, 1931, in Abilene, Kansas. By 1975, it had established more
List of Beta Sigma Phi chapters
List_of_Beta_Sigma_Phi_chapters
Absorption and transmission of neutrons by nuclear reactor materials
-D\nabla ^{2}\Phi +\Sigma _{a}\Phi ={\frac {1}{k}}\nu \Sigma _{f}\Phi } . where k is the criticality eigenvalue, ν {\displaystyle \nu } is the neutrons
Geometric and material buckling
Geometric_and_material_buckling
Notion in measure theory
{\displaystyle (X,\Sigma ,\mu )} and ( Y , Φ , ν ) {\displaystyle (Y,\Phi ,\nu )} are σ-finite measure spaces ( μ , ν {\displaystyle \mu ,\nu } positive) and
Lifting_theory
International historically African American collegiate fraternity
succession founded at Howard: Omega Psi Phi (1911), Delta Sigma Theta (1913), Phi Beta Sigma (1914) and Zeta Phi Beta (1920). Kappa Alpha Psi was founded
Alpha_Phi_Alpha
"Lambda Beta Phi Fraternity & Sorority International Foundation, Inc". Dun & Bradstreet. Retrieved 2026-06-28. "History". Megalith Nu Sigma Phi - MEGANS SOCIETY
List of fraternities and sororities in the Philippines
List_of_fraternities_and_sororities_in_the_Philippines
Defunct Jewish-interest collegiate fraternity
Kappa Nu (ΚΝ) was an American college fraternity that was active from 1911 to 1961 when it merged with Phi Epsilon Pi. Kappa Nu was founded at the University
Kappa_Nu
News". The Crescent of Gamma Phi Beta. 4 (3): 134. June 1904. Retrieved February 24, 2025 – via Google Books. "Sigma Pi Phi Fraternity". sigmapiphi.com
List of African-American fraternities and sororities
List_of_African-American_fraternities_and_sororities
Alpha Sigma Phi is an intercollegiate men's social fraternity. Following is a list of notable members of Alpha Sigma Phi. List of Alpha Sigma Phi chapters
List of Alpha Sigma Phi members
List_of_Alpha_Sigma_Phi_members
Sigma Sigma Phi is an American osteopathic medicine honors fraternity for students training to be Doctors of Osteopathic Medicine. It was founded in 1921
List of Sigma Sigma Phi chapters
List_of_Sigma_Sigma_Phi_chapters
African American college fraternity
Sigma Phi Rho Fraternity, Inc. (ΣΦΡ) is an African American collegiate fraternity. It was established at Wagner College in Staten Island, New York in
Sigma_Phi_Rho
Christian college in Grove City, Pennsylvania, US
Grove City College (GCC) is a private, conservative Christian liberal arts college in Grove City, Pennsylvania, United States. It was founded in 1876 as
Grove_City_College
Phi Gamma Delta (ΦΓΔ) 2018 Alpha Sigma Phi (ΑΣΦ) 2020 Pi Kappa Alpha (ΠΚΑ) 1871 Beta Theta Pi (ΒΘΠ) 1876 Kappa Sigma (ΚΣ) 1890 Sigma Nu (ΣΝ) 1922 Phi
List of College of William & Mary fraternities and sororities
List_of_College_of_William_&_Mary_fraternities_and_sororities
Upsilon Nu". Omega Psi Phi Fraternity, Upsilon Nu chapter. Archived from the original on July 28, 2011. Retrieved September 14, 2010. "Epsilon Phi Chapter
List_of_Omega_Psi_Phi_members
Kappa Psi Nu, established in 1921. Chapter was formed by absorbing Sigma Epsilon Chi, established in 1981. Chapter formed by absorbing Phi Lambda Alpha
List of Kappa Alpha Order chapters
List_of_Kappa_Alpha_Order_chapters
International collegiate fraternity (defunct)
five of its remaining chapters became part of Phi Delta Theta in 1886. One chapter merged into Sigma Nu. The badge was a gold Jerusalem cross in the center
Kappa_Sigma_Kappa
Indianapolis Recorder "Omega Psi Phi Fraternity to hosting convention" Author: Roundtree, Kristin Ebony Jul 2000 p 16 Omicron Nu chapter history Delta Kappa
List of Omega Psi Phi Grand Conclaves
List_of_Omega_Psi_Phi_Grand_Conclaves
2022-12-30. "Sigma Beta Phi Sorority". Sigma Beta Phi Sorority. Retrieved 20 April 2018. "Sigma Gamma Rho Sorority, Inc. Lambda Nu Sigma Chapter". Sigma Gamma
Fraternities and sororities in Canada
Fraternities_and_sororities_in_Canada
originated as Phi Sigma Nu (local) in 1925. This chapter originated as Delta Zeta Delta (local) in 1924. This chapter originated as Phi Chi (local) in
List_of_Pi_Beta_Phi_chapters
Religious social organization for men
chapters. Sigma Theta Epsilon was formed in 1941 from the merger of two Methodist-affiliated fraternities: Phi Tau Theta, founded in 1925, and Sigma Epsilon
Christian_fraternities
Sigma Sigma Sigma sorority has 98 active chapters. Following is a list of Sigma Sigma Sigma chapters. Active chapters noted in bold, inactive chapters
List of Sigma Sigma Sigma chapters
List_of_Sigma_Sigma_Sigma_chapters
Eta | Phi Kappa Theta". pkt.mit.edu. Retrieved February 3, 2025. "MIT Sigma Nu". sigmanu.mit.edu. Retrieved February 3, 2025. "Phi Delta Theta". phi-delts
List of Massachusetts Institute of Technology fraternities and sororities
List_of_Massachusetts_Institute_of_Technology_fraternities_and_sororities
2012. "Famous Members of Sigma Nu". Sigma Nu Fraternity Inc. "IMDb: Vir Das". IMDb. "Notable Sigma Nu Members". Sigma Nu. Retrieved December 26, 2020
List_of_Sigma_Nu_members
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
American collegiate fraternity
the formation of Nu Phi, which stood for "non-fraternity." The group of 15 men developed an opposing slate and began campaigning. Nu Phi adopted the outline
Pi_Kappa_Phi
of Kappa Omicron Nu. Became the Kappa Alpha Pi chapter of Kappa Omicron Nu. Became the Kappa Alpha Sigma chapter of Kappa Omicron Nu. Became the Kappa
List of Kappa Omicron Phi chapters
List_of_Kappa_Omicron_Phi_chapters
International historically Black fraternity
province. The original name (Kappa Alpha Nu) is the source of the nickname for members, "Nupes". The phrase Phi Nu Pi (ΦΝΠ) has a deeper meaning only known
Kappa_Alpha_Psi
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