Two conjectures of Victor Thebault linking tetrahedra with quadrics - Blas Herrera

  1. Tác giả: LTTK CTV
    Đánh giá: ✪ ✪ ✪ ✪ ✪

    Two conjectures of Victor Thebault linking tetrahedra with quadrics - Blas Herrera​

    We prove two of Thebault's conjectures. The first (1949) links four lines, that they are rulings of hyperbolic paraboloids or that they are coplanar, with orthocentric or isodynamic tetrahedra, respectively. The second (1953) links the radical center of four spheres with elements of tetrahedra.

    [​IMG]​

    ✪ ✪ ✪ ✪ ✪


    Link tải tài liệu:

    LINK TẢI TÀI LIỆU


     

    Xem các chủ đề cùng chuyên mục

    LTTK CTV, 9/10/19
    #1