The most well known line elements are those of cartesian planar and spatial coordinates. They are given by
Other line elements are given by:
The most general 2- dimensional (coordinates (χ,ψ)) metric is given by
Wipo Publishes Patent of Caterpillar Motoren, Benjamin Bleyer, Werner Rebelein, Fuat Uslu, Jan Janzen, Bilal Bakindi for "Double-Walled Fuel Supply Line Element" (German Inventors)
Dec 14, 2012; GENEVA, Dec. 14 -- Publication No. WO/2012/163462 was published on Dec. 6.Title of the invention: "DOUBLE-WALLED FUEL SUPPLY LINE...
WIPO PUBLISHES PATENT OF DAIMLER FOR "DEVICE FOR CONNECTING A LINE ELEMENT TO A COMPONENT" (GERMAN INVENTORS)
Jan 22, 2012; GENEVA, Jan. 22 -- Publication No. WO/2012/007109 was published on Jan. 19. Title of the invention: "DEVICE FOR CONNECTING A LINE...