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Variational Carleson embeddings into the upper 3-space

In this paper we formulate embedding maps into time-frequency space related to the Carleson operator and its variational counterpart. We prove bounds for these embedding maps by iterating the outer measure theory of [DT15]. Introducing iterated outer $L^p$ spaces is a main novelty of this paper. [DT15] Yen Do and Christoph Thiele. "$L^p$ theory for outer measures and two themes of Lennart Carleson united". In: Bulletin of the American Mathematical Society 52.2 (2015), pp. 249-296.