### Sums of squares and ~~modular number theory~~

#### Works connected to ~~Boris Abramovich Datskovsky~~

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Sums of squares and the preservation of modularity under congruence restrictions,” pp. 59–71 in Symbolic computation, number theory, special functions, physics and combinatorics (Gainesville, FL, 11–13 November 1999). Edited by F. G. Garvan and M. E. H. Ismail. Developments in Mathematics 4. Kluwer Academic (Dordrecht), 2001. MR 1880079 Zbl 1040.11018 incollection

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