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- Ali Emrouznejad, M. Zerafat Angiz L, William Ho
- JORS
- 2012

The existing assignment problems for assigning n jobs to n individuals are limited to the considerations of cost or profit measured as crisp. However, in many real applications, costs are not deterministic numbers. This paper develops a procedure based on Data Envelopment Analysis method to solve the assignment problems with fuzzy costs or fuzzy profits for… (More)

- L L, Me L
- 1997

We consider the problem of tting an n n distance matrix D by a tree metric T . This problem is NP-hard for most reasonable distance functions between D and T . Recently, an approximation algorithm was presented [1] which achieves a factor of 3 approximation to the L 1 best tting tree. We call this method the Single Pivot (SP) heuristic Within the biology… (More)

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