AI
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The 
hairpin was used to specify the notation and was introduced by Chopin probably in [AG] (→GE). However, according to us, it is likely that the beginning of the mark was reproduced inaccurately, which is indicated by the beginning of the respective mark of AF in analogous b. 117-118.
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category imprint: Differences between sources; Editorial revisions
issues: Scope of dynamic hairpins
notation: Articulation, Accents, Hairpins