Graph-matrix calculus (GPH), Legendre-Fenchel conjugate
gphstar = gph_lft(gph)
matrix. A function in GPH matrix form.
matrix. The conjugate of the function gph, in GPH matrix form.
Computes the Legendre-Fenchel conjugate of a given GPH function. For a convex PLQ function f with GPH matrix [x;s;y], the GPH matrix of the conjuagte, f*, is
Bryan Gardiner
, University of British Columbia, BC, Canada