{"product_id":"9781441921116","title":"Convexity and Well-posed Problems","description":"\u003cp\u003eWe shall consider convex functions from the most modern point of view: a function is de?ned to be convex whenever its epigraph, the set of the points lying above the graph, is a convex set. Except for trivial cases, the minimum value must be taken at a point where the function is not +?, hence at a point in the constraint set.\u003c\/p\u003e","brand":"Springer","offers":[{"title":"Default Title","offer_id":49318227017955,"sku":"00000_00000_00000_00000","price":54.99,"currency_code":"USD","in_stock":true}],"url":"https:\/\/usa.kinokuniya.com\/products\/9781441921116","provider":"Books Kinokuniya USA","version":"1.0","type":"link"}