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The theory of tides is the application of continuum mechanics to interpret and predict the tidal deformations of planetary and satellite bodies and their atmospheres and oceans (especially Earth's oceans) under the gravitational loading of another astronomical body or bodies (especially the Moon and Sun).
Maxwell's equations, or Maxwell–Heaviside equations, are a set of coupled partial differential equations that, together with the Lorentz force law, form the foundation of classical electromagnetism, classical optics, electric and magnetic circuits. The equations provide a mathematical model for electric, optical, and radio technologies, such ...
The first book on the systematic algebraic solutions of linear and quadratic equations by the Persian scholar Muhammad ibn Mūsā al-Khwārizmī. The book is considered to be the foundation of modern algebra and Islamic mathematics. [10] The word "algebra" itself is derived from the al-Jabr in the title of the book. [11]
[39] [40] In the mid-18th century, Benjamin Franklin included a recipe for an abortifacient in a math textbook. [41] [42] In 1728, Franklin condemned publisher Samuel Keimer for publishing an article on abortion. According to biographer Walter Isaacson, Franklin did not have a strong view on the issue. [43]
Parabola. Part of a parabola (blue), with various features (other colours). The complete parabola has no endpoints. In this orientation, it extends infinitely to the left, right, and upward. The parabola is a member of the family of conic sections. In mathematics, a parabola is a plane curve which is mirror-symmetrical and is approximately U ...
In mathematics, the discrete Fourier transform (DFT) converts a finite sequence of equally-spaced samples of a function into a same-length sequence of equally-spaced samples of the discrete-time Fourier transform (DTFT), which is a complex-valued function of frequency. The interval at which the DTFT is sampled is the reciprocal of the duration ...
William Howe, 5th Viscount Howe, in a letter to William Legge, 2nd Earl of Dartmouth, about the British army's decision to leave Boston, dated March 21, 1776. Many crucial events of the American Revolution occurred in or near Boston. The then-town's mob presence, along with the colonists' growing lack of faith in either Britain or its Parliament, fostered a revolutionary spirit there. When the ...
Award-winning author John Edgar Wideman grew up in Pittsburgh and has based several of his books, including the memoir Brothers and Keepers, in his hometown. Poet Terrance Hayes , winner of the 2010 National Book Award and a 2014 MacArthur Foundation Fellow, received his MFA from the University of Pittsburgh, where he is a faculty member.