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I presume the OP is looking for examples from mathematics. Here is one:

Hadrien De March, Nizar Touzi: Irreducible convex paving for decomposition of multi-dimensional martingale transport plans (submitted February 27, 2017, at 14.23 hours)

Jan Obłój, Pietro Siorpaes: Structure of martingale transports in finite dimensions (submitted February 27, 2017, at 18.52 hours)

The second paper explains: