background and objectives : hepatitis c virus genotyping appears to be vital for predicting the response to antiviral therapy. the present study aimed to analyze the hcv genotypes in relation to persistence or clearance of the virus in residents of hamadan province, west-iran. material and methods : a total of 1159 recorded questionnaires of hcv infected people were evaluated in this prospectiv...

The not all equal (NAE) 3-SAT problem is known to be NP-complete even in the absence of negated variables (see [11]), a variant known as positive (or monotone) NAE 3-SAT. In this article, we investigate a related category, dubbed positive NAE LE3SAT (PNAE LE3-SAT), in which each clause has at most three variables, none of which is negated, and an assignment is sought that will satisfy such an e...