00332nam a2200121Ia 4500082001900000100004300019245002300062260003500085300001400120490003800134500000500172700003300177  a515.1bR643.CF  aRoberts, A. Wayne and Varberg, Dale E.  aConvex functionsb  aNew YorkbAcademic Pressc1973  axx, 300p.  aPure and Applied Mathematicsv 57  a  aVarberg, Dale E. ; jt. auth.