- The Hidden Fortress (Wikipedia)
The Hidden Fortress (Japanese: 隠し砦の三悪人, Hepburn: Kakushi Toride no San Akunin, lit. ‘The Three Villains of the Hidden Fortress’) is a 1958 Japanese jidaigeki adventure film directed by Akira Kurosawa, with special effects by Eiji Tsuburaya. It tells the story of two peasants who agree to escort a man and a woman across enemy lines in return for gold without knowing that he is a general and the woman is a princess. The film stars Toshiro Mifune as General Makabe Rokurōta and Misa Uehara as Princess Yuki while the peasants, Tahei and Matashichi, are portrayed by Minoru Chiaki and Kamatari Fujiwara respectively.
- Cartesian coordinate system (Wikipedia)
In geometry, a Cartesian coordinate system (UK: /kɑːrˈtiːzjən/, US: /kɑːrˈtiːʒən/) in a plane is a coordinate system that specifies each point uniquely by a pair of real numbers called coordinates, which are the signed distances to the point from two fixed perpendicular oriented lines, called coordinate lines, coordinate axes or just axes (plural of axis) of the system. The point where they meet is called the origin and has (0, 0) as coordinates.