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Bosonic Fradkin-Tseytlin equations unfolded

“…Let us note that in paper [2] algebra isu(2, 2) was denoted as hsc (4), where hsc means higher spin conformal and 4 indicates that it extends 4-dimensional conformal algebra. In the later paper [5] algebra iu(2, 2) was denoted as cu(1, 0|8) and algebra isu(2, 2) was denoted as hu 0 (1, 0|8), where 8 indicates the number of oscillators used and pair 1,0 points out that above algebras have trivial structure in spin 1 Yang-Mills sector.…”