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The irreducibility of the space of curves of given genus
 Publ. Math. IHES
, 1969
"... Fix an algebraically closed field k. Let Mg be the moduli space of curves of genus g over k. The main result of this note is that Mg is irreducible for every k. Of course, whether or not M s is irreducible depends only on the characteristic of k. When the characteristic s o, we can assume that k ~ ..."
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Cited by 506 (2 self)
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from char. o to char. p provided that p> 2g qi. Unfortunately, attempts to extend this method to all p seem to get stuck on difficult questions of wild ramification. Nowadays, the Teichmtiller theory gives a thoroughly analytic but very profound insight into this irreducibility when kC. Our
Brain magnetic resonance imaging with contrast dependent on blood oxygenation.
 Proc. Natl. Acad. Sci. USA
, 1990
"... ABSTRACT Paramagnetic deoxyhemoglobin in venous blood is a naturally occurring contrast agent for magnetic resonance imaging (MRI). By accentuating the effects of this agent through the use of gradientecho techniques in high fields, we demonstrate in vivo images of brain microvasculature with imag ..."
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Cited by 648 (1 self)
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to localized spectroscopy (2) and chemical shift imaging (3) that are applicable to many chemical species, MRI of water protons has been functionally extended to NMR angiography (4), perfusion imaging It has previously been demonstrated (8, 9) that the presence of deoxyhemoglobin in blood changes the proton
The Determinants of Credit Spread Changes.
 Journal of Finance
, 2001
"... ABSTRACT Using dealer's quotes and transactions prices on straight industrial bonds, we investigate the determinants of credit spread changes. Variables that should in theory determine credit spread changes have rather limited explanatory power. Further, the residuals from this regression are ..."
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Cited by 422 (2 self)
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quadratic regression σ(K) = a + bK + cK 2 , where K is the strike price. Our estimate of this slope, jump t , is defined via where F is the atthe money strike price, which equals the current futures price. We choose to look at the implied volatility at K = .9F because we do not want 6 to extrapolate the quadratic
Support vector machines for 3D object recognition
 PATTERN ANALYSIS AND MACHINE INTELLIGENCE
, 1998
"... Support Vector Machines (SVMs) have been recently proposed as a new technique for pattern recognition. Intuitively, given a set of points which belong to either of two classes, a linear SVM finds the hyperplane leaving the largest possible fraction of points of the same class on the same side, while ..."
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Cited by 252 (14 self)
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the potential of SVMs on a database of 7,200 images of 100 different objects. The proposed system does not require feature extraction and performs recognition on images regarded as points of a space of high dimension without estimating pose. The excellent recognition rates achieved in all the performed
Generalization Of An Inequality By Talagrand, And Links With The Logarithmic Sobolev Inequality
 J. Funct. Anal
, 2000
"... . We show that transport inequalities, similar to the one derived by Talagrand [30] for the Gaussian measure, are implied by logarithmic Sobolev inequalities. Conversely, Talagrand's inequality implies a logarithmic Sobolev inequality if the density of the measure is approximately logconcave, ..."
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Cited by 244 (12 self)
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distance d(x; y) = inf 8 < : s Z 1 0 j _ w(t)j 2 dt; w 2 C 1 ((0; 1); M); w(0) = x; w(1) = y 9 ...
Global and regional climate changes due to black carbon,
 Nat. Geosci.,
, 2008
"... Figure 1: Global distribution of BC sources and radiative forcing. a, BC emission strength in tons per year from a study by Bond et al. Full size image (42 KB) Review Nature Geoscience 1, 221 227 (2008 Black carbon in soot is the dominant absorber of visible solar radiation in the atmosphere. Ant ..."
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Cited by 228 (5 self)
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the South Asian region, averaged from 20° N to 40° N and from 70° E to 100° E. The blue line is the change due to the increase in all GHGs and sulphate aerosols as simulated by ref. 60. The red line is the estimated temperature change due to BC taken from the global circulation model study of Chung
The eigenvalues of random symmetric matrices
 Combinatorica
, 1981
"... Let A:(at;) be an zxn matrix whose entries for i=j are independent random variables and ai;:aii. Suppose that every a;; is bounded and for eveÍy i>j we have Eaii:!, D2ai,:62 and Eaiiv. E. P. Wigner determined the asymptotic behavior of the eigenvalues of I (semicircle law). In particular, for a ..."
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Cited by 179 (0 self)
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, for any c>2a with probability I o (1) all eigenvalues except for at most o (n) lie in the interval t:(_,Íi ' ci). We show that with probability 1o(1) a/ / eigenvalues belong to the above interval 1if p:0, while in case p=0 only the largest eigenvalue,lt is outside /, and n,: , Zl.iaii &apos
Selfdetermination and persistence in a reallife setting: Toward a motivational model of high school dropout.
 Journal of Personality and Social Psychology,
, 1997
"... The purpose of this study was to propose and test a motivational model of high school dropout. The model posits that teachers, parents, and the school administration's behaviors toward students influence students' perceptions of competence and autonomy. The less autonomy supportive the so ..."
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Cited by 183 (19 self)
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, and 12 of unspecified gender) in the "persistent" group. Thus, 57% of all dropouts were boys, whereas only 43% were girls. This difference is significant, Results Motivation Toward School and Behavioral Intentions A 2 (type of student: dropout vs. persistent) X 2 (gender) x 7 (type of school
Abyssal recipes
 DeepSea Res
, 1966
"... AbstractVertical distributions in the interior Pacific (excluding tbe top and bottom kilometer) are not inzonsistent with a simple model involving aconstant upward vertical velozity w ~ 12 cm clu yt and eddy diffusivity, ¢ ~ 1.3 cm ~ sec1. Thus temperature and salinity can be fitted by expone ..."
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Cited by 175 (0 self)
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by exponentiallike solutions to [,¢ d"/dz: w. d/d:] T, S = 0, with,c/w ~ 1 km the appropriate " ' scale height." For Carbon 14 a decay term must be included, [ ]:~C = ~ 1~C; a fitting of the solution to the observed 1~C distribution yields,,/w2 ~ 200 years for the appropriate "
A critical role for the right frontoinsular cortex in switching between centralexecutive and defaultmode networks.
 Proc Natl Acad Sci USA
, 2008
"... Cognitively demanding tasks that evoke activation in the brain's centralexecutive network (CEN) have been consistently shown to evoke decreased activation (deactivation) in the defaultmode network (DMN). The neural mechanisms underlying this switch between activation and deactivation of larg ..."
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Cited by 178 (1 self)
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regions that overlap with the CEN and SN are important for multiple cognitive control functions, including initiation, maintenance, and adjustment of attention (7). However, no studies to date have directly assessed the temporal dynamics and causal interactions of specific nodes within the CEN, SN
Results 1  10
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5,722