C J Isham1
Published under licence by IOP Publishing Ltd
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Citation C J Isham 1977 J. Phys. A: Math. Gen. 10 1397
DOI 10.1088/0305-4470/10/8/018
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It is shown that the homotopy classes of soliton-type solutions to chiral field theories in three space dimensions are determined entirely by cohomological properties. This result is employed to construct topological currents which are identically conserved and whose integrated time component contains all the homotopical information.