Color Gauge Invariance and the Origin of the Mass Gap

The following sections are included:

• Introduction

• The gluon Schwinger – Dyson equation

• Transversality of the full gluon self-energy

• Slavnov – Taylor identity for the full gluon propagator

• The general structure of the full gluon propagator

• Non-perturbative vs. Perturbative QCD

• The Mass Gap

• Subtraction at the fundamental gluon propagator level

• Discussion

• Appendix: Application for Abelian case

• Problems