Well-posedness in critical spaces for incompressible viscoelastic fluid system

In this paper, we study the well-posedness in critical spaces of incompressible viscoelastic fluid system of Oldroyd model. Precisely, for this system with initial data in Besov space of critical regularity, we prove the existence and uniqueness of the local solution, which is also shown to exist globally in time provided the initial data is small under certain norms.