Introduces a signed analogue of the Lovász theta function and theta body for balanced colourings, equal to half the theta number of the double-switching conflict graph.
Springer, Berlin, 1988
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A Lov\'asz Theta Parameter and Theta Body for Signed Graphs
Introduces a signed analogue of the Lovász theta function and theta body for balanced colourings, equal to half the theta number of the double-switching conflict graph.