On the stationary eccentricity of a system of four-tangent conics
1909 ◽
Vol 28
◽
pp. 2-5
Let the convex quadrilateral formed by the four given tangents be ABA′B′, and O the intersection of the diagonals. Let OA and OB be taken as axes of x and y. Denote OA, OA′, OB and OB′ by a, a′, b and b′, a and b being positive, and a′ and b′ negative. The tangential equation of the system is thenwhere k is a variable parameter; for the equation is satisfied when the straight line lx + my + 1 = 0 passes through any two adjacent angular points of the quadrilateral.
1927 ◽
Vol 46
◽
pp. 210-222
◽
1905 ◽
Vol 40
(2)
◽
pp. 253-262
1924 ◽
Vol 22
(2)
◽
pp. 167-168
1925 ◽
Vol 22
(5)
◽
pp. 694-699
◽
1927 ◽
Vol 46
◽
pp. 314-315
1986 ◽
Vol 28
(1)
◽
pp. 37-45
◽
Keyword(s):
2004 ◽
Vol 134
(6)
◽
pp. 1099-1113
1924 ◽
Vol 22
(1)
◽
pp. 1-10
◽
Keyword(s):
1911 ◽
Vol 30
◽
pp. 69-74