摘要: Basics.- Caratheodory's Construction and Lower-Dimensional Measures.- Invariant Measures the of Haar Measure..- Covering Theorems Differentiation Integrals.- Analytical Tools: The Area Formula, Coarea Poincare Inequalities..- Calculus Differential Forms Stokes's Theorem.- to Currents.- Currents Variations.- Regularity Mass-Minimizing Currents.