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    Generalization of Schensted insertion algorithm to the cases of hooks and semi-shuffles

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    Given an rc-graph RR of permutation ww and an rc-graph YY of permutation vv, we provide an insertion algorithm, which defines an rc-graph R←YR\leftarrow Y in the case when vv is a shuffle with the descent at rr and ww has no descents greater than rr or in the case when vv is a shuffle, whose shape is a hook. This algorithm gives a combinatorial rule for computing the generalized Littlewood-Richardson coefficients cwvuc^{u}_{wv} in the two cases mentioned above.Comment: 22 page
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