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Partial differential equations (PDEs): Existence and uniqueness, regularity, boundary conditions, linear and non-linear operators, stability, soliton theory, integrable PDEs, conservation laws, qualitative dynamics.

8 votes

What is an "Instanton" in classical gauge theory? (to a mathematician)

Generally speaking, you could say they are a special type of solution to the field equations of gauge theories. More specifically, an instanton is a classical solution in a classical Euclidean field …
Hollis Williams's user avatar
5 votes
1 answer
206 views

References for systems of elliptic PDEs

I was wondering if there were any recent references dealing with the theory of systems of elliptic PDEs: in particular, someone was telling me about something which sounded like 'Schur complementarity …
Hollis Williams's user avatar
1 vote
0 answers
104 views

Modelling fluid flows with mean curvature flow

A while ago I was wondering if the displacement of fluid described in this blog post could be modelled with mean curvature flow or some other flow, but when I asked someone in Engineering they replied …
Hollis Williams's user avatar
1 vote
0 answers
104 views

Existence theory with an integral equation

I am reading a paper in which it is proposed that one can solve a problem from mathematical physics by establishing an existence theory for a system of equations. One of the equations in the system i …
Hollis Williams's user avatar
1 vote
0 answers
40 views

System of equations with one integral equation

Start with a system of three equations such that two of the equations are ordinary or partial differential equations, but one of them is an integral equation as follows: $C = \int_{0}^{\infty} X \: …
Hollis Williams's user avatar