Degree of rational maps versus syzygies
نویسندگان
چکیده
One proves a far-reaching upper bound for the degree of generically finite rational map between projective varieties over base field arbitrary characteristic. The is expressed as product certain degrees that appear naturally by considering Rees algebra (blowup) ideal defining map. Several special cases are obtained consequences, some which cover and extend previous results in literature.
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ژورنال
عنوان ژورنال: Journal of Algebra
سال: 2021
ISSN: ['1090-266X', '0021-8693']
DOI: https://doi.org/10.1016/j.jalgebra.2021.01.001