The satisfiability (SAT) problem is a core, problem in mathematical logic and computing theory. In practice, SAT is fundamental in solving many problems in automated reasoning, computer-aided design, computeraided manufacturing, machine vision, database, robotics, integrated circuit design, computer architecture design, and computer network design. Traditional methods treat SAT as a discrete, c...

A total of 500 serum samples collected from cattle and buffaloes from various livestock farms in Punjab were analysed for brucella antigens. Out of these 500 sera, Rose Bengal Plate Test (RBPT) recorded 79(15.8%) positive. These RBPT positive samples were subjected to routine serum agglutination (SAT) and modified SAT (EDTA added) tests. The SAT showed 18(22.7%) positive, 42(53.1%) doubtful and...

The Satisfiability problem (SAT) is a famous NP-Complete problem, which consists of an assignment of Boolean variables (true or false) and some clauses formed of these variables. A clause is a disjunction of some Boolean literals and can be true if and only if any of them is true. A SAT instance is satisfied if and only if all the clauses are simultaneously true. As a generalization of SAT, the...

We provide some evidence that Unique -SAT is as hard to solve as general -SAT, where -SAT denotes the satisfiability problem for -CNFs and Unique SAT is the promise version where the given formula has or solutions. Namely, defining for each , a -time randomized algorithm for -SAT and, similarly, a -time randomized algorithm for Unique -SAT , we show that . As a corollary, we prove that, if Uniq...

Assuming 3-SAT formulas are hard to refute with high probability, Feige showed approximation hardness results, among others for the max bipartite clique. We extend this result in that we show that approximating max bipartite clique is hard under the weaker assumption, that random 4-SAT formulas are hard to refute with high probability. On the positive side we present an efficient algorithm whic...

In this paper, we propose a new approach for solving the SAT problem. This approach consists in representing SAT instances thanks to an undirected graph issued from a polynomial transformation from SAT to the CLIQUE problem. Considering this graph, we exploit well known properties of chordal graphs to manipulate the SAT instance. Firstly, these properties allow us to define a new class of SAT p...

Logic locking is a technique that’s proposed to protect outsourced IC designs from piracy and counterfeiting by untrusted foundries. A locked IC preserves the correct functionality only when a correct key is provided. Recently, the security of logic locking is threatened by a new attack called SAT attack, which can decipher the correct key of most logic locking techniques within a few hours [1]...

The SAT Competitions constitute a well-established series of yearly open international algorithm implementation competitions, focusing on the Boolean satisfiability (or propositional satisfiability, SAT) problem. In this article, we provide detailed account 2020 instantiation Competition, including new competition tracks and benchmark selection procedures, overview solving strategies implemente...

Surface air temperature (SAT) from four reanalysis/analysis datasets are analyzed and compared with the observed SAT from 11 stations in the Antarctic. It is found that the SAT variation from Goddard Institute for Space Studies (GISS) is the best to represent the observed SAT. Then we use the sea ice concentration (SIC) data from satellite measurements, the SAT data from the GISS dataset and st...