Results 1 to 10 of about 306 (28)

Brill-Noether theory for curves of a fixed gonality

open access: yesForum of Mathematics, Pi, 2021
We prove a generalisation of the Brill-Noether theorem for the variety of special divisors $W^r_d(C)$ on a general curve C of prescribed gonality. Our main theorem gives a closed formula for the dimension of $W^r_d(C)$ . We build on previous
David Jensen, Dhruv Ranganathan
doaj   +1 more source

Qualifier en politique : l’exemple du problème alcool [PDF]

open access: yes, 1988
Le titre du dernier congrès de la Société française de santé publique – « Décision en santé publique : obligation, négociation, participation ? » – ne laisse pas de contenter les sociologues et les politistes.
Bergeron, Henri
core   +1 more source

A metric graph satisfying w41=1$w_4^1 = 1$ that cannot be lifted to a curve satisfying dim⁡ (W41)=1$\dim \;(W_4^1 ) = 1$

open access: yesOpen Mathematics, 2016
For all integers g ≥ 6 we prove the existence of a metric graph G with w41=1$w_4^1 = 1$ such that G has Clifford index 2 and there is no tropical modification G′ of G such that there exists a finite harmonic morphism of degree 2 from G′ to a metric ...
Coppens Marc
doaj   +1 more source

HYPERELLIPTIC GRAPHS AND METRIZED COMPLEXES

open access: yesForum of Mathematics, Sigma, 2017
We prove a version of Clifford’s theorem for metrized complexes. Namely, a metrized complex that carries a divisor of degree $2r$ and rank
YOAV LEN
doaj   +1 more source

Nodal curves with general moduli on K3 surfaces [PDF]

open access: yes, 2007
We investigate the modular properties of nodal curves on a low genus K3 surface. We prove that a general genus g curve C is the normalization of a d-nodal curve X sitting on a primitively polarized K3 surface S of degree 2p-2, for p any integer between 3
Flamini, Flaminio   +3 more
core   +2 more sources

Curves with only triple ramification [PDF]

open access: yes, 2002
I show that the set of smooth curves of genus g admitting branched coverings X->P^1 with only triple ramification points has dimension at least max(2g-3,g).
Schroeer, Stefan
core   +4 more sources

Clifford index for reduced curves [PDF]

open access: yes, 2018
We extend the notion of Clifford index to reduced curves with planar singularities by considering rank 1 torsion free sheaves. We investigate the behaviour of the Clifford index with respect to the combinatorial properties of the curve and we show that ...
Franciosi, Marco
core   +2 more sources

ANALYSE LEXICALE DE LA QUALITÉ DE VIE AU TRAVAIL DES PSYCHIATRES À L'HÔPITAL

open access: yes, 2014
International audiencePurpose:A qualitative study was conducted in 2013 with hospital psychiatrists working in two psychiatric hospitals of different regions in order to document the quality of work life of public hospital psychiatrists.
Bellagamba, Gauthier   +2 more
core   +2 more sources

On tropical Clifford's Theorem

open access: yes, 2010
We prove an analogue of Clifford's inequality for tropical curves. Next we focus on the hyperelliptic case and we characterize divisors attaining equality. Finally we speculate whether inequality in tropical Clifford's Theorem does imply hyperellipticity,
Facchini, Laura
core   +1 more source

Geometry of vector bundle extensions and applications to a generalised theta divisor [PDF]

open access: yes, 2013
Let E and F be vector bundles over a complex projective smooth curve X, and suppose that 0 -> E -> W -> F -> 0 is a nontrivial extension. Let G be a subbundle of F, and D an effective divisor on X.
Hitching, George H.
core   +2 more sources

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