2009-02-28

06:40 transitive law

Tag:Englishmath2009-02-28

  • n.
    • 推移律
    • ∀x,y,z∈A (xRy ∧ yRz ⇒ xRz)
    • for all x, y and z in X it holds that if xRy and yRz then xRz.

2009-02-08

02:55 convex hull

Tag:Englishmath2009-02-08

  • 凸包（凸集合）→幾何学