Mathematician and physicist Julius Plücker extended the study of Lamé curves and introduced modern abridged algebraic notation. His name is referenced in Plücker equations on the order and class of a curve, Plücker coordinates in geometry, and Plücker embedding and the Plücker formula in mathematics. With Heinrich Geissler he constructed the first modern luminous gas discharge tubes, researched magnetic effects on the electric discharge in rarefied gases, discovered the fluorescent glow later identified as being caused by cathode rays, and noted how these rays could be controlled. His students included cathode ray physicist Johann Hittorf.
Author of books: Analytisch-Geometrische Entwickelungen (Developments in Analytical Geometry) (1828) System der Analytischen Geometrie (System of Analytical Geometry) (1835) Theorie der Algebraischen Kurven (Theory of Algebraic Curves) (1839) Neue Geometrie des Raumes (New Geometry of Space) (1868)
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