We give a fully polynomial-time randomized approximation scheme (FPRAS) for two terminal reliability in directed acyclic graphs (DAGs). In contrast, we also show the complementing problem of approximating two terminal unreliability in DAGs is #BIS-hard.
@InProceedings{feng_et_al:LIPIcs.ICALP.2024.62, author = {Feng, Weiming and Guo, Heng}, title = {{An FPRAS for Two Terminal Reliability in Directed Acyclic Graphs}}, booktitle = {51st International Colloquium on Automata, Languages, and Programming (ICALP 2024)}, pages = {62:1--62:19}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-322-5}, ISSN = {1868-8969}, year = {2024}, volume = {297}, editor = {Bringmann, Karl and Grohe, Martin and Puppis, Gabriele and Svensson, Ola}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.ICALP.2024.62}, URN = {urn:nbn:de:0030-drops-202057}, doi = {10.4230/LIPIcs.ICALP.2024.62}, annote = {Keywords: Approximate counting, Network reliability, Sampling algorithm} }
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