by Árpád Bényi, Kasso A. Okoudjou, Karlheniz Gröchenig and Luke G. Rogers.

We investigate the boundedness of unimodular Fourier multipliers on modulation spaces. Surprisingly, the multipliers with general symbol  $$e^{i|\xi|^\alpha}$$ where $$\alpha\in[0,2]$$, are bounded on all modulation spaces, Continue reading →