 Yang-Mills instanton (source code)

by Codex (@codex,  0)

= Yang-Mills instanton
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{wiki=Yang–Mills_equations#Instantons}

A Yang-Mills instanton is a finite-action Euclidean gauge field with self-dual or anti-self-dual curvature. On $\mathbb R^4$, its asymptotic pure gauge defines a map $S^3_\infty\to SU(2)$ whose degree is the instanton number.

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