We establish an exactly tight relation between reversible pebblings of graphs and Nullstellensatz refutations of pebbling formulas, showing that a graph G can be reversibly pebbled in time t and space s if and only if there is a Nullstellensatz refutation of the pebbling formula over G in size t+1 and degree s (independently of the field in which the Nullstellensatz refutation is made). We use this correspondence to prove a number of strong size-degree trade-offs for Nullstellensatz, which to the best of our knowledge are the first such results for this proof system.
@InProceedings{derezende_et_al:LIPIcs.CCC.2019.18, author = {de Rezende, Susanna F. and Nordstr\"{o}m, Jakob and Meir, Or and Robere, Robert}, title = {{Nullstellensatz Size-Degree Trade-offs from Reversible Pebbling}}, booktitle = {34th Computational Complexity Conference (CCC 2019)}, pages = {18:1--18:16}, series = {Leibniz International Proceedings in Informatics (LIPIcs)}, ISBN = {978-3-95977-116-0}, ISSN = {1868-8969}, year = {2019}, volume = {137}, editor = {Shpilka, Amir}, publisher = {Schloss Dagstuhl -- Leibniz-Zentrum f{\"u}r Informatik}, address = {Dagstuhl, Germany}, URL = {https://drops.dagstuhl.de/entities/document/10.4230/LIPIcs.CCC.2019.18}, URN = {urn:nbn:de:0030-drops-108403}, doi = {10.4230/LIPIcs.CCC.2019.18}, annote = {Keywords: proof complexity, Nullstellensatz, pebble games, trade-offs, size, degree} }
Feedback for Dagstuhl Publishing