scholarly journals An existence and uniqueness theorem for the dynamics of flexural shells

2019 ◽  
Vol 25 (2) ◽  
pp. 317-336 ◽  
Author(s):  
Paolo Piersanti

In this paper, we define, a priori, a natural two-dimensional model for a time-dependent flexural shell. As expected, this model takes the form of a set of hyperbolic variational equations posed over the space of admissible linearized inextensional displacements, and a set of initial conditions. Using a classical argument, we prove that the model under consideration admits a unique strong solution. However, the latter strategy makes use of function spaces, which are not amenable for numerically approximating the solution. We thus provide an alternate formulation of the studied problem using a suitable penalty scheme, which is more suitable in the context of numerical approximations. For the sake of completeness, in the final part of the paper, we also provide an existence and uniqueness theorem for the case where the linearly elastic shell under consideration is an elliptic membrane shell.

2019 ◽  
Vol 30 (09) ◽  
pp. 1950043 ◽  
Author(s):  
Jun Wang

We study the Neumann problem for complex special Lagrangian equations with critical phase. A priori derivative estimates up to order two are established. And we obtain the existence and uniqueness theorem by the method of continuity.


2021 ◽  
Vol 2021 ◽  
pp. 1-6
Author(s):  
Atimad Harir ◽  
Said Melliani ◽  
Lalla Saadia Chadli

In this study, fuzzy conformable fractional differential equations are investigated. We study conformable fractional differentiability, and we define fractional integrability properties of such functions and give an existence and uniqueness theorem for a solution to a fuzzy fractional differential equation by using the concept of conformable differentiability. This concept is based on the enlargement of the class of differentiable fuzzy mappings; for this, we consider the lateral Hukuhara derivatives of order q ∈ 0,1 .


2009 ◽  
Vol 42 (2) ◽  
Author(s):  
Wen-rong Li ◽  
Sui Sun Cheng

AbstractA Picard type existence and uniqueness theorem is established for iterative differential equations of the form


Sign in / Sign up

Export Citation Format

Share Document