Research article

Regularity of weak solutions to a class of fourth order parabolic variational inequality problems arising from swap option pricing

  • Received: 21 February 2023 Revised: 29 March 2023 Accepted: 29 March 2023 Published: 12 April 2023
  • MSC : 35K99, 97M30

  • This article concerns the regularity of weak solutions for a variational inequality problem constructed by a fourth-order parabolic operator which has received much attention recently. We first consider the internal regular estimate of weak solutions using the difference type test function. Then, the near edge regularity and global regularity of weak solutions are analyzed by using the finite cover principle. Since the quadratic gradient of the weak solution does not satisfy the conditions for a test function, we have constructed a test function using a spatial difference operator to complete the proof of regularity. The results show that the weak solution has a second order regularity and an $ {L^\infty }(0, T;{H^2}(\Omega)) $ estimation independent of the lower order norm of the weak one.

    Citation: Yuejiao Feng. Regularity of weak solutions to a class of fourth order parabolic variational inequality problems arising from swap option pricing[J]. AIMS Mathematics, 2023, 8(6): 13889-13897. doi: 10.3934/math.2023710

    Related Papers:

  • This article concerns the regularity of weak solutions for a variational inequality problem constructed by a fourth-order parabolic operator which has received much attention recently. We first consider the internal regular estimate of weak solutions using the difference type test function. Then, the near edge regularity and global regularity of weak solutions are analyzed by using the finite cover principle. Since the quadratic gradient of the weak solution does not satisfy the conditions for a test function, we have constructed a test function using a spatial difference operator to complete the proof of regularity. The results show that the weak solution has a second order regularity and an $ {L^\infty }(0, T;{H^2}(\Omega)) $ estimation independent of the lower order norm of the weak one.



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