
doi: 10.3934/era.2020109
<p style='text-indent:20px;'>We outline the construction of special functions in terms of Fredholm determinants to solve boundary value problems of the string spectral problem. Our motivation is that the string spectral problem is related to the spectral equations in Lax pairs of at least three nonlinear evolution equations from mathematical physics.</p>
evolution equations, Integral representations of solutions to PDEs, Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.), Hunter-Saxton equation, General topics in linear spectral theory for PDEs, integrability, Initial value problems for nonlinear higher-order PDEs, Fredholm determinants
evolution equations, Integral representations of solutions to PDEs, Completely integrable infinite-dimensional Hamiltonian and Lagrangian systems, integration methods, integrability tests, integrable hierarchies (KdV, KP, Toda, etc.), Hunter-Saxton equation, General topics in linear spectral theory for PDEs, integrability, Initial value problems for nonlinear higher-order PDEs, Fredholm determinants
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