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In this paper, we investigate the thermodynamics and weak cosmic censorshipconjecture in a RN-AdS black hole with the cloud of strings and quintessence bythe scattering of a scalar field. The variations of the thermodynamic variablesare calculated in the normal and extended phase spaces. In the normal phasespace, where the cosmological constant is considered as a constant, the firstand second laws of thermodynamics are satisfied. In the extended phase space,where the cosmological constant and the parameters related to the cloud ofstrings and quintessence are treated as variables, the first law ofthermodynamics is still satisfied and the second law of thermodynamics isindefinite. Moreover, we find that the weak cosmic censorship conjecture isvalid for the extremal and near-extremal black holes in both phase spaces.

Remarks on the weak cosmic censorship conjecture of RN-AdS black holes with cloud of strings and quintessence under the scalar field