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- National Research Council CanadaCA185 papers
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67 papers · 1 filter
Invariant bilinear forms of algebras given by faithfully flat descent
E. Neher, A. Pianzola, D. Prelat +1
The existence of nondegenerate invariant bilinear forms is one of the most important tools in the study of Kac-Moody Lie algebras and extended affine Lie algebras. In practice, the…
Equivariant functions and vector-valued modular forms
Hicham Saber, Abdellah Sebbar
For any discrete group and any 2-dimensional complex representation of , we introduce the notion of equivariant functions, and we show that they are parameterized by…
Femtosecond 240-keV electron pulses from direct laser acceleration in a low-density gas
Vincent Marceau, Charles Varin, Thomas Brabec +1
We propose a simple laser-driven electron acceleration scheme based on tightly focused radially polarized laser pulses for the production of femtosecond electron bunches with energ…
Estimation of Human Body Shape and Posture Under Clothing
Stefanie Wuhrer, Leonid Pishchulin, Alan Brunton +2
Estimating the body shape and posture of a dressed human subject in motion represented as a sequence of (possibly incomplete) 3D meshes is important for virtual change rooms and se…
Amplification of Angular Rotations Using Weak Measurements
Omar S. Magana-Loaiza, Mohammad Mirhosseini, Brandon Rodenburg +1
We present a weak measurement protocol that permits a sensitive estimation of angular rotations based on the concept of weak-value amplification. The shift in the state of a pointe…
Invariants of degree 3 and torsion in the Chow group of a versal flag
Alexander Merkurjev, Alexander Neshitov, Kirill Zainoulline
We prove that the group of normalized cohomological invariants of degree 3 modulo the subgroup of semidecomposable invariants of a semisimple split linear algebraic group G is isom…