In the main text we give a pair of 
hairpins, being a result of Chopin proofreading of GE1a (→GE2); it is also FE that has identical indications. Hence Chopin returned – in a modified form – to the original idea written in AI. The abbreviated sign of GE1 is an attempt to interpret a not entirely clear notation of A; another attempt was made in GE3, ignoring the authentic proofreading of GE1a.
Compare the passage in the sources »
category imprint: Graphic ambiguousness; Differences between sources; Corrections & alterations
issues: GE revisions, Authentic corrections of GE, Unclear hairpins in A
notation: Articulation, Accents, Hairpins