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math.FA2024
Noncommutative Cotlar identities for groups acting on tree-like structures
Adrian Gonzalez-Perez, Javier Parcet, Runlian Xia
Let be a noncommutative Fourier multiplier. In recent work, Mei and Ricard introduced a noncommutative analogue of Cotlar's identity in order to prove that certain multiplier…
math.FA2024
The local geometry of idempotent Schur multipliers
Javier Parcet, Mikael de la Salle, Eduardo Tablate
A Schur multiplier is a linear map on matrices which acts on its entries by multiplication with some function, called the symbol. We consider idempotent Schur multipliers, whose sy…