List of Articles Fazel Badakhshan Farahabadi Article 1 - Dimension Reduction of Big Data and Deleting Noise and Its Efficiency in the Decision Tree Method and Its Use in Covid 19 20.1001.1.22286225.2022.12.3.4.2 10.30495/ijm2c.2022.1947200.1239 Fazel Badakhshan Farahabadi Kianoush Fathi Vajargah Rahman Farnoosh International Journal of Mathematical Modeling & Computations , Issue 4 , Year , Summer 2022