Geodesic
Quantum string theory in four-dimensional space-time
Teoretičeskaâ i matematičeskaâ fizika, Tome 72 (1987) no. 3, pp. 424-435 
G. P. Pron'ko. Quantum string theory in four-dimensional space-time. Teoretičeskaâ i matematičeskaâ fizika, Tome 72 (1987) no. 3, pp. 424-435. http://geodesic.mathdoc.fr/item/TMF_1987_72_3_a9/
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     title = {Quantum string theory in four-dimensional space-time},
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Voir la notice de l'article provenant de la source Math-Net.Ru

Lorentz-invariant quantum string theory is constructed in four-dimensional spacetime. Unlike the traditional approach which results in the breaking of the Lorentz-invariance, our method is based on the use of different variables for describing string configurations. The method of an auxiliary spectral problem for periodic potentials is the main tool in constructing these new variables.

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