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1976: Howard University establishes the first PhD program in mathematics at a historically black college or university under mathematics department chair James Donaldson and professor J. Ernest Wilkins Jr. 1980: The Claytor Lecture – now the Claytor-Woodard Lecture in honor of William W S Claytor and Dudley Weldon Woodard – is established ...
1855–1905. Inventor. Folding "cabinet-bed", forerunner of the Murphy bed; first African-American woman to receive a patent in the United States. [81] [82] [83] Grant, George F. 1846–1910. Dentist, professor. The first African-American professor at Harvard, Boston dentist, and inventor of a wooden golf tee .
Black Mathematicians and Their Works. Black Mathematicians and Their Works is an edited volume of works in and about mathematics, by African-American mathematicians. It was edited by Virginia Newell, Joella Gipson, L. Waldo Rich, and Beauregard Stubblefield, with a foreword by Wade Ellis, and published in 1980 by Dorrance & Company.
Leucism ( / ˈluːsɪzəm, - kɪz -/) [2] [3] [4] is a wide variety of conditions that result in partial loss of pigmentation in an animal —causing white, pale, or patchy coloration of the skin, hair, feathers, scales, or cuticles, but not the eyes. [4] It is occasionally spelled leukism. Some genetic conditions that result in a "leucistic ...
The heyoka ( heyókȟa, also spelled "haokah," "heyokha") is a kind of sacred clown in the culture of the Sioux ( Lakota and Dakota people) of the Great Plains of North America. The heyoka is a contrarian, jester, and satirist, who speaks, moves and reacts in an opposite fashion to the people around them. Only those having visions of the ...
The black and white ropes that appear to form spirals are in fact concentric circles. The mid-twentieth century Op art or optical art style of painting and graphics exploited such effects to create the impression of movement and flashing or vibrating patterns seen in the work of artists such as Bridget Riley , Spyros Horemis, [191] and Victor ...
Patterns in nature are visible regularities of form found in the natural world. These patterns recur in different contexts and can sometimes be modelled mathematically. Natural patterns include symmetries, trees, spirals, meanders, waves, foams, tessellations, cracks and stripes. [1] Early Greek philosophers studied pattern, with Plato ...
Movement in Squares, by Bridget Riley 1961. Op art, short for optical art, is a style of visual art that uses optical illusions. [1] Op artworks are abstract, with many better-known pieces created in black and white. Typically, they give the viewer the impression of movement, hidden images, flashing and vibrating patterns, or swelling or warping.