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3,249
KodairaSpencer theory of gravity and exact results for quantum string amplitudes
 Commun. Math. Phys
, 1994
"... We develop techniques to compute higher loop string amplitudes for twisted N = 2 theories with ĉ = 3 (i.e. the critical case). An important ingredient is the discovery of an anomaly at every genus in decoupling of BRST trivial states, captured to all orders by a master anomaly equation. In a particu ..."
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Cited by 545 (60 self)
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We develop techniques to compute higher loop string amplitudes for twisted N = 2 theories with ĉ = 3 (i.e. the critical case). An important ingredient is the discovery of an anomaly at every genus in decoupling of BRST trivial states, captured to all orders by a master anomaly equation. In a
Strategies of Discourse Comprehension
, 1983
"... El Salvador, Guatemala is a, study in black and white. On the left is a collection of extreme MarxistLeninist groups led by what one diplomat calls “a pretty faceless bunch of people.’ ’ On the right is an entrenched elite that has dominated Central America’s most populous country since a CIAbacke ..."
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Cited by 601 (27 self)
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El Salvador, Guatemala is a, study in black and white. On the left is a collection of extreme MarxistLeninist groups led by what one diplomat calls “a pretty faceless bunch of people.’ ’ On the right is an entrenched elite that has dominated Central America’s most populous country since a CIAbacked coup deposed the reformist government of Col. Jacobo Arbenz Guzmán in 1954. Moderates of the political center. embattled but alive in E1 Salvador, have virtually disappeared in Guatemalajoining more than 30.000 victims of terror over the last tifteen vears. “The situation in Guatemala is much more serious than in EI Salvador, ” declares one Latin American diplomat. “The oligarchy is that much more reactionary. and the choices are far fewer. “ ‘Zero’: The Guatemalan oligarchs hated Jimmy Carter for cutting off U.S. military aid in 1977 to protest humanrights abusesand the rightwingers hired marimba bands and set off firecrackers on the night Ronald Reagan was elected. They considered Reagan an ideological kinsman and believed they had a special
Quantum field theory on noncommutative spaces
"... A pedagogical and selfcontained introduction to noncommutative quantum field theory is presented, with emphasis on those properties that are intimately tied to string theory and gravity. Topics covered include the WeylWigner correspondence, noncommutative Feynman diagrams, UV/IR mixing, noncommuta ..."
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Cited by 397 (26 self)
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A pedagogical and selfcontained introduction to noncommutative quantum field theory is presented, with emphasis on those properties that are intimately tied to string theory and gravity. Topics covered include the WeylWigner correspondence, noncommutative Feynman diagrams, UV/IR mixing, noncommutative YangMills theory on infinite space and on the torus, Morita equivalences of noncommutative gauge theories, twisted reduced models, and an indepth study of the gauge group of noncommutative YangMills theory. Some of the more mathematical ideas and
On conformal field theories
 in fourdimensions,” Nucl. Phys. B533
, 1998
"... We review the generalization of field theory to spacetime with noncommuting coordinates, starting with the basics and covering most of the active directions of research. Such theories are now known to emerge from limits of M theory and string theory, and to describe quantum Hall states. In the last ..."
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Cited by 366 (1 self)
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We review the generalization of field theory to spacetime with noncommuting coordinates, starting with the basics and covering most of the active directions of research. Such theories are now known to emerge from limits of M theory and string theory, and to describe quantum Hall states. In the last few years they have been studied intensively, and many qualitatively new phenomena have been discovered, both on the classical and quantum level. Submitted to Reviews of Modern Physics.
Tutte's 5Flow Conjecture for Graphs of Nonorientable Genus 5
 J. of Graph Theory
, 1996
"... We develop four constructions for nowherezero 5flows of 3regular graphs which satisfy special structural conditions. Using these constructions we show a minimal counterexample to Tutte's 5flow conjecture is of order 44 and therefore every bridgeless graph of nonorientable genus 5 has a n ..."
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Cited by 2 (1 self)
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We develop four constructions for nowherezero 5flows of 3regular graphs which satisfy special structural conditions. Using these constructions we show a minimal counterexample to Tutte's 5flow conjecture is of order 44 and therefore every bridgeless graph of nonorientable genus 5 has a
Nonorientable biembeddings . . .
 DISCRETE MATHEMATICS
, 2004
"... Constructions due to Ringel show that there exists a nonorientable face 2colourable triangular embedding of the complete graph on n vertices (equivalently a nonorientable biembedding of two Steiner triple systems of order n) for all n ≡ 3 (mod 6) with n ≥ 9. We prove the corresponding existence th ..."
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Constructions due to Ringel show that there exists a nonorientable face 2colourable triangular embedding of the complete graph on n vertices (equivalently a nonorientable biembedding of two Steiner triple systems of order n) for all n ≡ 3 (mod 6) with n ≥ 9. We prove the corresponding existence
Blocking nonorientability of a surface
, 2001
"... Let � be a nonorientable surface. A collection of pairwise noncrossing simple closed curves in � is a blockage if every onesided simple closed curve in � crosses at least one of them. Robertson and Thomas [9] conjectured that the orientable genus of any graph G embedded in � with sufficiently large ..."
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Cited by 2 (1 self)
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Let � be a nonorientable surface. A collection of pairwise noncrossing simple closed curves in � is a blockage if every onesided simple closed curve in � crosses at least one of them. Robertson and Thomas [9] conjectured that the orientable genus of any graph G embedded in � with sufficiently large
COUNTEREXAMPLES TO THE BAUM–CONNES CONJECTURE
 GAFA GEOMETRIC AND FUNCTIONAL ANALYSIS
, 2002
"... The Baum–Connes conjecture [BC], [BCH] proposes a formula for the operator Ktheory of reduced group C ∗algebras and foliation C ∗algebras. If G is the fundamental group of a finite CWcomplex then the Baum– Connes conjecture for G canbeviewedasananalyticcounterpartofthe Borel conjecture in manifo ..."
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The Baum–Connes conjecture [BC], [BCH] proposes a formula for the operator Ktheory of reduced group C ∗algebras and foliation C ∗algebras. If G is the fundamental group of a finite CWcomplex then the Baum– Connes conjecture for G canbeviewedasananalyticcounterpartofthe Borel conjecture
Results 1  10
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3,249