501 research outputs found
Adjoints and pluricanonical Adjoints to an Algebraic Hypersurface
No full textWe develop the theory of canonical and pluricanonical
adjoints,
of global canonical and pluricanonical adjoints, and
of adjoints and global adjoints to an irreducible, algebraic
hypersurface
V \subset P^n, under certain hypotheses on the singularities of V. We
subsequently apply the results
of the theory to construct a non-singular threefold of general type X,
desingularization
of a hypersurface V of degree six in P^4, having the birational invariants
q_1=q_2=p_g=0,
P_2=P_3=5. We demonstrate that the bicanonical map \varphi_{|2K_X|} is
birational and finally, as a consequence of the Riemann-Roch theorem and
vanishing theorems, we prove that any non-singular model Y, birationally
equivalent to X, has the canonical divisors
K_Y that do not (simultaneously) satisfy the two properties:
(K_Y^3)>0 and K_Y numerically effective
Threefolds with Kodaira dimension 0 or 3
No full textUsing the theory of adjoints and pluricanonical adjoints, we construct three nonsingular threefolds, as desingularizations of degree six hypersurfaces in \P^4, having the irregularities q_1=q_2=0 and the following periodical sequences of plurigenera respectively
(p_g,P_2,P_3,...,P_m,...)=(0,0,1,0,0,1,...), (0,0,0,1,0,0,0,1,...), (0,0,0,0,1,0,0,0,0,1,...).
In the Appendix, starting from the second above-mentioned example, we construct a threefold of general type with q_1=q_2=0, p_g=1, P_2=2 whose m-canonical transformation is birational if and only if m \geq 11
Gaps in the birationality of pluricanonical transformations.
No full textWe construct a nonsingular threefold X of general
type as a desingularization of a double space of degree 10 in P^4, of
which an affine equation is
t^2+f_{10}(x,y,z)=0. X has the birational
invariants q_1=q_2=p_g=P_2=P_3=0,P_4=1 and its
m-canonical
transformation \varphi_{|mK_X|}, where K_X is a canonical divisor on X,
has fibers that are generically finite sets if and only if m \geq 16, and it
is birational if and only if m=23 or m \geq 27
STAGNARO, Adriana A. Ciencia a pulmón: etnografías de laboratorios argentinos de biotecnología. Buenos Aires: Fundación CICCUS: CLACSO, 2015. 320 p.
No full text“Ciência a pulmão” é um livro de fôlego. Adriana Stagnaro levou mais de uma década coletando dados etnográficos sobre as condições de produção da ciência e da biotecnologia na Argentina para utilizá-las como base de sua tese de doutorado (defendida em 2012) e como base desse livro publicado em 2015. Foi ao longo dos anos de 1993, 1994, 1995, 1996, 1997, 1998, 1999 e 2006 que Stagnaro colocou para si como questão quais foram os efeitos da década de neoliberalismo argentino para as formas de pr..
The nanostructured morphology of linear polyurethanes observed by transmission electron microscopy
No full textEstrous cycle and ovulation time in native goats
No full textCONTENIDO
Editorial
González Stagnaro, Carlos
Morfología del tracto genital de los pequeños rumiantes
Morphology of the genital system of small ruminants
Nuñez M., Quiterio
Cambios ováricos durante el ciclo estrual en cabras criollas
Changes of the ovary during the estrous cycle of native goats
González Stagnaro, Carlos y Madrid Bury, Ninoska
Ciclo estrual y momento de ovulación en cabras criollas
Estrous cycle and ovulation time in native goats
González Stagnaro, Carlos y Madrid Bury, Ninoska
Neuroendocrinología de la reproducción en el caprino
Reproductive reuroendocrinology in goats
Chemineau, P. y Delgadillo, J. A.
Aspectos característicos de la fisiología de la oveja
Some aspects of the reproductive physiology of the ewes
López Sebastián, A.; Santiago Moreno, J.; De Bulnes, A.G. y García López, M.
Comportamiento reproductivo en ovinos tropicales
Reproductive performance in tropical sheep
De Cambellas, Josefina B.
Comportamiento reproductivo de la cabra en los trópicos
Reproductive performance of the goats in the tropics
García B., O. y García B., E.
Endocrinología de cabras criollas ovidectomizadas y mestizas en zonas semiáridas de Venezuela
Endocrine profiles of ovidectomized native and crossbred goats in semiarid zones of Venezuela
Leyva Ocariz, H.; Stabenfeldt, G. H.; Munro, C.; Arteaga, M.; Orduz, B.; Díaz, M. y Hernández, I.
Mensajes Institucionales99 - 112bimestralNivel analític
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