TY - JOUR
T1 - Approximating the weight of shallow steiner trees
AU - Kortsarz, Guy
AU - Peleg, David
PY - 1999/7/20
Y1 - 1999/7/20
N2 - This paper deals with the problem of constructing Steiner trees of minimum weight with diameter bounded by d, spanning a given set of v vertices in a graph. Exact solutions or logarithmic ratio approximation algorithms were known before for the cases of d ≤ 5. Here we give a polynomial-time approximation algorithm of ratio O(log v) for constant d, which is asymptotically optimal unless P = NP, and an algorithm of ratio O(vε), for any fixed 0 < ε < 1, for general d.
AB - This paper deals with the problem of constructing Steiner trees of minimum weight with diameter bounded by d, spanning a given set of v vertices in a graph. Exact solutions or logarithmic ratio approximation algorithms were known before for the cases of d ≤ 5. Here we give a polynomial-time approximation algorithm of ratio O(log v) for constant d, which is asymptotically optimal unless P = NP, and an algorithm of ratio O(vε), for any fixed 0 < ε < 1, for general d.
UR - http://www.scopus.com/inward/record.url?scp=0037574082&partnerID=8YFLogxK
U2 - 10.1016/S0166-218X(99)00111-0
DO - 10.1016/S0166-218X(99)00111-0
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AN - SCOPUS:0037574082
SN - 0166-218X
VL - 93
SP - 265
EP - 285
JO - Discrete Applied Mathematics
JF - Discrete Applied Mathematics
IS - 2-3
ER -