Can a conviction or civil judgment stand on tainted/perjury testimony?

Questions Presented (Questions are cited under_Title 28 USC 1331) 1.) Can a conviction or civil judment stand on Tainted/Perjury Testimony? . . 2.) Does the Court have a duty, too correct tainted testimony? , 3.) Does tainted testimony constitute Fraud upon the Court? 4.) Does the Court have a Duty and must correct Fraud on the Court? (Where a conviction or summary judgment has been ill-gotten, through false means.) : 5.) Can a Appeals Court, rule on evidence of Fraud upon the Court brought for the first time? 6.) Is it a Court's duty, too acknowledge and rule on Fraud upon the Court? ‘ 7.) Does the Appeals Court abuse its own authority, not following the doctrine of Stare Decisis and Horiizontal Stare when : evidence supports party's standing? . . 8.) Is it mandatory, that at any stage of proceedings, a Court must perform its duty. Too, investigate Fraud upon the Court? . , 2 ‘