Stillman's conjecture via generic initial ideals

Draisma, Jan; Lason, Michael; Leykin, Anton (2019). Stillman's conjecture via generic initial ideals. Communications in algebra, 47(6), pp. 2384-2395. Taylor & Francis 10.1080/00927872.2019.1574806

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Using recent work by Erman–Sam–Snowden, we show that finitely generated ideals in the ring of bounded-degree formal power series in infinitely many variables have finitely generated Gröbner bases relative to the graded reverse lexicographic order. We then combine this result with the first author’s work on topological Noetherianity of polynomial functors to give an algorithmic proof of the following statement: ideals in polynomial rings generated by a fixed number of homogeneous polynomials of fixed degrees only have a finite number of possible generic initial ideals, independently of the number of variables that they involve and independently of the characteristic of the ground field. Our algorithm outputs not only a finite list of possible generic initial ideals, but also finite descriptions of the corresponding strata in the space of coefficients.

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