Title: Some root invariants at the prime 2
Author(s): Mark Behrens
Author's e-mail address: mbehrens@math.mit.edu

Abstract:

The first part of this paper consists of lecture notes which summarize the
machinery of filtered root invariants. A conceptual notion of "homotopy Greek
letter element" is also introduced, and evidence is presented that it may be
related to the root invariant. In the second part we compute some low
dimensional root invariants of v_1-periodic elements at the prime 2.