Castelnuovo–Mumford regularity

E223664

Castelnuovo–Mumford regularity is an invariant in commutative algebra and algebraic geometry that measures the complexity of the minimal graded free resolution of a module or sheaf, often used to control vanishing of cohomology and bounds on generators.

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Statements (47)

Predicate Object
instanceOf algebraic invariant ⓘ
homological invariant ⓘ
invariant in algebraic geometry ⓘ
invariant in commutative algebra ⓘ
alsoKnownAs CM regularity ⓘ
appliesTo coherent sheaves on projective space ⓘ
graded modules over a polynomial ring ⓘ
homogeneous ideals ⓘ
arisesFrom Castelnuovo’s work on Hilbert functions of curves ⓘ
Mumford’s work on projective embeddings and cohomology ⓘ
context projective schemes over a field ⓘ
standard graded algebras over a field ⓘ
controls bounds on degrees of generators ⓘ
bounds on degrees of syzygies ⓘ
vanishing of sheaf cohomology ⓘ
definedFor coherent sheaves on projective schemes ⓘ
finitely generated graded modules ⓘ
definedVia maximal degree shift in a minimal free resolution minus homological index ⓘ
vanishing of graded pieces of local cohomology modules ⓘ
hasVariant asymptotic regularity ⓘ
multigraded regularity ⓘ
implies global generation of sufficiently high twists of a sheaf ⓘ
surjectivity of restriction maps for high twists ⓘ
measures complexity of minimal graded free resolutions ⓘ
namedAfter David Mumford ⓘ
Guido Castelnuovo ⓘ
property finite for finitely generated graded modules over a polynomial ring ⓘ
invariant under isomorphism of graded modules ⓘ
nonnegative integer for standard graded polynomial rings over a field ⓘ
relatedTo Betti numbers ⓘ
Green’s conjecture on syzygies ⓘ
Hilbert polynomial ⓘ
Mumford’s theorem on regularity ⓘ
graded local cohomology ⓘ
minimal graded free resolution ⓘ
syzygies of projective varieties ⓘ
studiedIn Eisenbud’s Commutative Algebra ⓘ
Lazarsfeld’s Positivity in Algebraic Geometry ⓘ
usedIn Castelnuovo–Mumford lemma ⓘ
Hilbert scheme theory ⓘ
bounding defining equations of projective varieties ⓘ
computational commutative algebra ⓘ
projective algebraic geometry ⓘ
syzygy theory ⓘ
usedToBound Castelnuovo–Mumford regularity of powers of ideals ⓘ
degrees of defining equations of projective embeddings ⓘ
postulation of projective schemes ⓘ

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Referenced by (9)

Full triples — surface form annotated when it differs from this entity's canonical label.

Hilbert’s syzygy theorem → relatedTo → Castelnuovo–Mumford regularity ⓘ
Castelnuovo–Mumford regularity → usedIn → Castelnuovo–Mumford lemma ⓘ
linked to: Castelnuovo–Mumford regularity
Castelnuovo–Mumford regularity → relatedTo → Mumford’s theorem on regularity ⓘ
linked to: Castelnuovo–Mumford regularity
Hilbert scheme theory → usesConcept → Castelnuovo–Mumford regularity ⓘ
Hilbert polynomial → usedIn → Castelnuovo–Mumford regularity theory ⓘ
linked to: Castelnuovo–Mumford regularity
Positivity in Algebraic Geometry I → topic → Castelnuovo–Mumford regularity ⓘ
Serre vanishing theorem → relatedTo → Castelnuovo–Mumford regularity ⓘ
Hartshorne Algebraic Geometry → subject → Castelnuovo–Mumford regularity ⓘ