helicobacter pylori is the main cause of gastric ulcer, adenocarcinoma and mucosa-associated lymphoid tissue (malt) lymphoma. up to now, different regimens have been used for helicobacter pylori (h.pylori) eradication to find the most potent and cost-effective regimen with less side effects. the aim of this study was to investigate the efficacy of standard triple therapy versus quadruple therap...

We give a matrix factorization for the solution of the linear system Ax = f , when coefficient matrix A is a dense symmetric positive definite matrix. We call this factorization as "WW T factorization". The algorithm for this factorization is given. Existence and backward error analysis of the method are given. The WDWT factorization is also presented. When the coefficient matrix is a symmetric...