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We examine and implement the concept of non-additive composition laws in thequantum theory of closed bosonic strings moving in (3+1)-dimensional Minkowskispace. Such laws supply exact selection rules for the merging and splitting ofclosed strings.Comment: 23 pages LaTe

THE INVARIANT CHARGES OF THE NAMBU–GOTO STRING THEORY: QUANTIZATION OF NON-ADDITIVE COMPOSITION LAWS