Civil Rights
Movements, leaders, victories and the continuing fight for equality.
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Explore the people, places, events, achievements, struggles and stories that shaped our journey.
Movements, leaders, victories and the continuing fight for equality.
Innovation, patents, science, technology and world-changing contributions.
Pioneers, champions, Negro Leagues, records, activism and excellence.
Meet the people whose lives, choices and achievements shaped the journey.
Black towns, communities, institutions and places where history happened.
Moments that changed communities, movements, institutions and the nation.
In 1968 Shirley Chisholm became the first Black woman elected to the United States Congress. In 1972 she launched a campaign for the Democratic presidential nomination, breaking another political barrier.
MORE →Reflects the personal views, recollections, and perspective of the author, Mike Davis.
This is a personal recollection on the Move fire on May 13, 1985
In mathematics, a Riemann form in the theory of abelian varieties and modular forms, is the following data:
(The hermitian form written here is linear in the first variable.)
Riemann forms are important because of the following:
Furthermore, the complex torus Cg/Λ admits the structure of an abelian variety if and only if there exists an alternating bilinear form α such that (Λ,α) is a Riemann form.
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In mathematics, a Riemann form in the theory of abelian varieties and modular forms, is the following data: A lattice Λ in a complex vector space Cg. An alternating bilinear form α from Λ to the integers satisfying the following Riemann bilinear relations: the real linear extension αR:Cg × Cg→R of α satisfies αR(iv, iw)=αR(v, w) for all (v, w) in Cg × Cg; the associated hermitian form H(v, w)=αR(iv, w) + iαR(v, w) is positive-definite. (The hermitian form written here is linear in the first variable.) Riemann forms are important because of the following: The alternatization of the Chern class of any factor of automorphy is a Riemann form. Conversely, given any Riemann form, we can construct a factor of automorphy such that the alternatization of its Chern class is the given Riemann form. Furthermore, the complex torus Cg/Λ admits the structure of an abelian variety if and only if there exists an alternating bilinear form α such that (Λ,α) is a Riemann form.
In mathematics, more specifically in multilinear algebra, an alternating multilinear map is a multilinear map with all arguments belonging to the same vector space (for example, a bilinear form or a multilinear form) that is zero whenever any pair of its arguments is equal. This generalizes directly to a module over a commutative ring. The notion of alternatization (or alternatisation) is used to derive an alternating multilinear map from any multilinear map of which all arguments belong to the same space.
Green Lantern is the name of several superheroes appearing in American comic books published by DC Comics. While the original debuted in All-American Comics #16 (July, 1940), the associated characters and core concept have changed significantly over its publication history; while the original concept was tied to a crime-fighting superhero who used the aid of a magic ring, the later concept (existing concurrently to the original) casts a set of characters in a science-fictional element as law enforcement officers. The original concept is tied to Alan Scott, the original version of the character created in 1940 by Martin Nodell with scripting or co-scripting of the first stories by Bill Finger during the Golden Age. Scott battled common criminals in Capitol City (and later Gotham City) with the aid of his magic ring tied to the force known as Starheart. Over time, Scott's character would be heavily tied to the Justice Society of America and became an inspiration for superheroes in the 21st century. The later concept would take form during the Silver Age onward, depicting characters with the name as members (chiefly those from Earth) of the Green Lantern Corps, an intergalactic law enforcement agency that fights the forces of evil with the aid of rings ("power rings") that grant a variety of extraordinary powers, all of which come from imagination, fearlessness, and the electromagnetic spectrum of emotional willpower. The concept was first explored during the Silver Age by John Broome and Gil Kane with Hal Jordan, a test pilot granted the Green Lantern Corps' power ring upon the death of alien Green Lantern Abin Sur, and inherits his position as the Green Lantern in charge of Earth and becomes legendary over time. Decades later, other characters are introduced with the title; Guy Gardner was the next character associated with the name, characterized as a staunch defender with a more abrasive, stubborn personality and a rebellious reputation. John Stewart was the fourth character to use the name, and is one of the highest-profile African-American superheroes; originally chosen as an alternative for Hal Jordan, his distinctive service marked the character as legendary. In the 1990s, Kyle Rayner, depicted as a struggling Mexican-American artist, became the fifth character to use the name when he was granted the ring following the initial destruction of the Green Lantern Corps by Jordan; he is characterized as more ordinary, but his constructs are more elaborate and intricate due to his artistic background. In the 2010s, Simon Baz is the sixth character known as Green Lantern. A Lebanese-American, Muslim, and former mechanic chosen as a Green Lantern, Baz develops a precognitive power that is rare among the Corps. Joining concurrently and partnered with Baz in the 2010s, Jessica Cruz is the seventh character introduced overall. A Mexican-American who suffered from crippling anxiety and depression, she was host to an alternate version of the power ring that chose those who succumbed to fear, but eventually broke free of it and eventually was made a Green Lantern. In the 2020s, Sojourner "Jo" Mullein, a bisexual African-American woman, was introduced as the eighth character. She is assigned to the Far Sector and is among the Corps' best investigators. The Green Lanterns are among DC Comics' longest-lasting sets of characters. They have been adapted to television, video games, and motion pictures.
Katherine Anne "Kitty" Pryde is a character appearing in American comic books published by Marvel Comics, commonly in association with the X-Men. The character first appeared in The Uncanny X-Men #129 (January 1980) and was co-created by writer-artist John Byrne and writer Chris Claremont. A mutant, Pryde possesses a "phasing" ability that allows her to pass through objects, hence she is intangible while using this ability. This power also disrupts any electrical field she passes through, and lets her simulate levitation. The youngest to join the X-Men, she was first portrayed as a "kid sister" to many older members of the group, filling the role of literary foil to the more established characters. She occasionally used the codenames Sprite and Ariel, cycling through several uniforms until settling on her trademark black-and-gold costume. In later comic books, she becomes schooled in fighting techniques and receives ninja stealth training, which combine with her powers to make her one of the X-Men's most proficient and reliable combatants. She is frequently deployed on surveillance and espionage missions. During the miniseries Kitty Pryde and Wolverine, she was renamed Shadowcat, the alias she would be most associated with, and shifted to a more mature depiction in her subsequent appearances. Pryde would eventually abandon her nickname, "Kitty", and switch to "Kate". She was one of the main cast of characters depicted in the original Excalibur title. After momentarily joining the Guardians of the Galaxy, she assumed her then-fiancé's superhero identity as the Star-Lord (Star-Lady). In the series Marauders, she was informally known as Captain Kate Pryde and the Red Queen of the Hellfire Trading Company. After rejoining the X-Men in the "Fall of X" relaunch, she assumes the name Shadowkat. In the 20th Century Fox X-Men film series, Kitty Pryde was initially portrayed by young actresses in cameos; Sumela Kay in X-Men (2000) and Katie Stuart in X2 (2003). Later, Elliot Page portrayed the character in X-Men: The Last Stand (2006) and X-Men: Days of Future Past (2014) in full-length appearances.
Before the 1921 destruction of Tulsa’s Greenwood District, Black residents had created a remarkable center of business and community life. The district included stores, professional offices, entertainment venues and homes owned by Black citizens. Understanding Greenwood means learning what was built—not only what was burned.
MORE →Joe Louis.
