All articles starting with P
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Princess Zelda
Princess Zelda, also Zelda, Hyrule's princess in Nintendo's The Legend of Zelda series since 1986; holder of the Triforce of Wisdom, alter egos Sheik and Tetra, and first mainline playable protagonist in Echoes of Wisdom (2024).
Princession Orchestra (プリンセッション・オーケストラ)
Princession Orchestra (プリンセッション・オーケストラ) is a 48-episode original TV anime that premiered April 6, 2025 on TV Tokyo's six-station network, produced by King Record, Aria Entertainment, and Takara Tomy with SILVER LINK., about singing princesses defending Alice Pia from Jamawock.
Princeton Digital Group
Princeton Digital Group is a Singapore-headquartered developer and operator of hyperscale data centers serving cloud and AI customers across seven Asian markets, backed by Warburg Pincus, with over 1.8 GW of capacity.
Princeton Large Torus
The Princeton Large Torus, or PLT, was a tokamak fusion experiment at Princeton Plasma Physics Laboratory that operated from 1975 to 1986 and set a 1978 world record for ion temperature.
Princeton Plasma Physics Laboratory
The Princeton Plasma Physics Laboratory, also known as Project Matterhorn, is a US Department of Energy fusion research lab in Princeton, New Jersey, managed by Princeton University.
Princeton Theological Seminary
Princeton Theological Seminary (PTS), Princeton, NJ: freestanding Presbyterian graduate school founded 1812, separate from Princeton University, ATS-accredited since 1938, eighth president Jonathan Lee Walton since 2023.
Princeton University
Princeton University, chartered 1746 as the College of New Jersey and renamed 1896, is a private New Jersey research university with a $35.9 billion endowment, top US News ranking, and expansive no-cost aid up to $150,000 family income.
Princeton University Press
Princeton University Press (PUP), founded 1905 with Charles Scribner's $1,000 gift, is a privately owned nonprofit scholarly publisher in Princeton, NJ, issuing about 250 hardcovers yearly across 40-plus disciplines, including Einstein's Meaning of Relativity and the Bollingen Series.
Princeton Vase
The Princeton Vase is a Late Classic Maya cylindrical chocolate drinking cup, painted in codex style around 670–750 CE and held by the Princeton University Art Museum.
Princeton, New Jersey
Princeton, New Jersey: consolidated Mercer County municipality (formed 2013 from Borough and Township) of about 31,000 residents, home of Princeton University, Nassau Hall, and the 1777 Battle of Princeton.
Princeville Climate Technology
Princeville Climate Technology is a climate-focused venture capital fund raised by Princeville Capital, which announced a first close of more than $300 million in 2019.
Princewill Ehibhatiomhan
Princewill Omonefe Ehibhatiomhan, born 2005 in Milton Keynes, English-Nigerian centre-forward; Reading academy product, Southampton professional since 2023, brother of Kelvin Ehibhatiomhan, loaned to Swindon Town and Salford City in 2025/26.
Princewill Umanmielen
Princewill Umanmielen, American college football defensive end; brother of NFL player Princely Umanmielen. Played at Nebraska, starred at Ole Miss (9.0 sacks, 2025), transferred to LSU in January 2026.
Principal areas of Wales
Principal areas of Wales are 22 single-tier administrative territories, defined by the Local Government (Wales) Act 1994, and are reviewed every 12 years by the Democracy and Boundary Commission Cymru.
Principal axis factoring
Principal axis factoring, also called iterated principal factor analysis, is an extraction method in exploratory factor analysis that repeatedly estimates communalities to model shared rather than total variance.
Principal bundle
A principal bundle is a fiber bundle whose fibers carry a free and transitive right action of a group G, locally resembling the product of the base with G.
Principal component analysis
Principal component analysis (PCA), also known as the Hotelling transform, is an unsupervised linear method that reduces a dataset's dimensionality by replacing correlated variables with fewer uncorrelated ones.
Principal component regression
Principal component regression (PCR) is a two-step regression method that applies PCA to the predictors and regresses the response on the component scores, reducing dimensionality and mitigating multicollinearity.
Principal curvature
Principal curvatures are the maximum and minimum values of the normal curvature of a surface at a point, occurring along perpendicular principal directions; their product gives the Gaussian curvature.
Principal Data Center Growth & Income Fund
The Principal Data Center Growth & Income Fund is a Delaware limited partnership formed in 2023, managed by Principal Real Estate Investors to develop US hyperscale data centers.
Principal Financial Group
Principal Financial Group is an American financial company providing retirement plans, asset management, and insurance. Founded in 1879 as Bankers Life Association, it administered $1.8 trillion in assets at the end of 2025.
Principal ideal domain
A principal ideal domain (PID) is an integral domain in which every ideal is generated by a single element, examples including the integers and the Gaussian integers.
Principal ideal theorem
The principal ideal theorem, also called the Artin–Furtwängler theorem, states that every ideal of a number field becomes principal in its Hilbert class field, proved in 1930.
Principal photography
Principal photography (also called production or the shoot) is the phase of film production when most filming occurs with the principal cast, between pre- and post-production, running from the first scheduled shooting day to picture wrap.
Principal quantum number
The principal quantum number, symbol n, labels the main energy shells of an electron in an atom, taking positive integer values 1, 2, 3, and so on.
Principal stratification
Principal stratification is a causal inference framework introduced by Constantine Frangakis and Donald Rubin in 2002 for comparing treatments while adjusting for a variable measured after treatment.
Principal stress
A principal stress is one of the three normal stresses acting on planes of zero shear stress at a point in a stressed body, found as eigenvalues of the stress tensor.
Principal versus agent considerations
Principal versus agent considerations are IFRS 15 and ASC 606 rules deciding whether a seller reports revenue gross as a principal or net as an agent.
Principal–agent model
The principal–agent model is an economic framework in which a principal designs contracts and incentives to motivate an agent whose effort or private information cannot be fully observed.
Principal–agent problem
The principal–agent problem, also known as agency theory, is the contracting problem arising when a principal delegates work to an agent whose actions it cannot fully observe.