Template:Selected anniversaries/October 11

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  1708: Mathematician, physicist, physician, and philosopher Ehrenfried Walther von Tschirnhaus dies. He invented the Tschirnhaus transformation, by which certain intermediate terms are removed from a given algebraic equation.

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  1889: Physicist and brewer James Prescott Joule dies. He studied the nature of heat, and discovered its relationship to mechanical work.

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  1932: Mathematician Anne Penfold Street born. She will specialize in combinatorics, authoring several textbooks; her work on sum-free sets will become a standard reference for its subject matter.

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  1940: Mathematician and physicist Vito Volterra dies. He was one of the founders of functional analysis, making contributions to mathematical biology and integral equations.

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  1965: Documentary photographer and photojournalist Dorothea Lange dies. Lange is remembered for her Depression-era work for the Farm Security Administration (FSA). Her photographs influenced the development of documentary photography and humanized the consequences of the Great Depression.

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  1996: Mathematician and acadaemic Edwin Spanier dies. Spanier contributed to algebraic topology, co-inventing Spanier–Whitehead duality and Alexander–Spanier cohomology; he also wrote what was for a long time the standard textbook on algebraic topology.