### Possible topics for student presentations in Math 720:

Structure of regular complete local rings (Cohen structure theorem)
Higher ramification groups of cyclotomic extensions
Higher ramification groups with inseparable residue fields
p^n cyclic extensions in characteristic p via Witt vectors
Proof of Hasse-Arf theorem
Introduction to etale fundamental groups
Torsors under elliptic curves
Etale cohomology as generalization of Galois cohomology
Lifting extensions of k[x] from characteristic p to characteristic 0

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