1.) Can a conviction or civil judment stand on Tainted/Perjury Testimony?

Does the Court have a duty, too correct tainted testimony?

Does tainted testimony constitute Fraud upon the Court?

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.)

Can a Appeals Court, rule on evidence of Fraud upon the Court brought for the first time?

Is it a Court's duty, too acknowledge and rule on Fraud upon the Court?

Does the Appeals Court abuse its own authority, not following the doctrine of Stare Decisis and Horiizontal Stare when evidence supports party's standing?

Is it mandatory, that at any stage of proceedings, a Court must perform its duty. Too, investigate Fraud upon the Court?

2

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