Reduction from Triangle Collection* to dynamic 4/3-Diameter: Difference between revisions

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== Implications ==  
== Implications ==  


assume: SETH or {3}SUM Hypothesis or APSP Hypothesis<br/>then: there exists no incremental (or decremental) algorithm that approximates the diameter of unweighted graph within a factor of ${4}/{3}-\epsilon$ running in amortized time $O(n^{1/{2}-\epsilon'})$ for any $\epsilon,\epsilon' > {0}$. Furthermore, if we allow node insertions in the incremental case the bound is $O(n^{0.{618}-\epsilon'})$
assume: SETH or {3}SUM Hypothesis or APSP Hypothesis<br/>then: there exists no static ${4}/{3}-\epsilon$ approximation with additive error $O(m^\delta)$ with running time $O(m^{\frac{3}{2}({1}-\delta)-\epsilon'})$ or incremental/decremental algorithm with amortized time $O(m^{\frac{1}{2}-\frac{3\delta}{2}-\epsilon'})$ for any $\epsilon,\epsilon' > {0}$


== Year ==  
== Year ==  

Latest revision as of 10:47, 28 April 2023

FROM: Triangle Collection* TO: dynamic 4/3-Diameter

Description

Implications

assume: SETH or {3}SUM Hypothesis or APSP Hypothesis
then: there exists no static ${4}/{3}-\epsilon$ approximation with additive error $O(m^\delta)$ with running time $O(m^{\frac{3}{2}({1}-\delta)-\epsilon'})$ or incremental/decremental algorithm with amortized time $O(m^{\frac{1}{2}-\frac{3\delta}{2}-\epsilon'})$ for any $\epsilon,\epsilon' > {0}$

Year

2016

Reference

Dahlgaard, S. (2016). On the hardness of partially dynamic graph problems and connections to diameter. arXiv preprint arXiv:1602.06705.

https://arxiv.org/abs/1602.06705