canbefoundintheBarYehudaandEven[7]algorithmfortheweightedVertexCoverproblem.There-introductionoftheenhancedprimaldualschemaleadingtoitscurrentimportanceisduetotheworksofAgarwal,KleinandRavi[1]andGoemansandWilliamson[17].Thelistofproblemstackledsuccessfullybyprimal-dualandlocal-ratioalgorithmislongandimpressive.Form...
We provide tools to bound the performance of primal dual and local ratio algorithms and supply a (log n + 1)/2 inapproximability result for set-cover, a 4/3 in-approximability for min steiner tree, and a 0.913 inapproximability for interval scheduling on two machines....
Note 2: I called it a "dual" problem to another well know problem: Given nn line segments [li,ri][li,ri] (1≤li≤ri≤2n1≤li≤ri≤2n), what is the minimal number of points to hit all the segments? This "primal" problem is easily solvable in O(nlogn)O(nlogn) by a gree...
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The optimplotmilp plot function now uses the labels Primal Bound and Dual Bound instead of Branch/bound UB and Branch/bound LB. 1-4 To avoid errors, change any custom output functions and plot functions to use the new field name. linprog "dual-simplex-legacy" algorithm will be removed in...
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We provide tools to bound the performance of primal dual and local ratio algorithms and supply a (log n + 1)/2 inapproximability result for set-cover, a 4/3 in-approximability for min steiner tree, and a 0.913 inapproximability for interval scheduling on two machines.Allan Borodin...
Nonlinear and linearised primal and dual initial boundary value problems: When are they bounded? How are they connected? - ScienceDirectJan Nordstrm a bJournal of Computational Physics