Bogomolny-Prasad-Sommerfield monopole (source code)

= Bogomolny-Prasad-Sommerfield monopole
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A Bogomolny-Prasad-Sommerfield monopole is a finite-energy Yang-Mills-Higgs configuration satisfying $B_i=\pm D_i\Phi$. Its magnetic charge is the degree of the normalized Higgs field at spatial infinity.