141,190 research outputs found
ClassTAL
This is the description of a Matlab script (classTAL.m) that automatically classifies BrainVoyager .voi maps with afni brain atlas. The script saves many useful output files
Multimodal music information processing and retrieval: survey and future challenges
Towards improving the performance in various music information processing
tasks, recent studies exploit different modalities able to capture diverse
aspects of music. Such modalities include audio recordings, symbolic music
scores, mid-level representations, motion, and gestural data, video recordings,
editorial or cultural tags, lyrics and album cover arts. This paper critically
reviews the various approaches adopted in Music Information Processing and
Retrieval and highlights how multimodal algorithms can help Music Computing
applications. First, we categorize the related literature based on the
application they address. Subsequently, we analyze existing information fusion
approaches, and we conclude with the set of challenges that Music Information
Retrieval and Sound and Music Computing research communities should focus in
the next years
The Pad\'e iterations for the matrix sign function and their reciprocals are optimal
It is proved that among the rational iterations locally converging with order
s>1 to the sign function, the Pad\'e iterations and their reciprocals are the
unique rationals with the lowest sum of the degrees of numerator and
denominator
The topology of the external activity complex of a matroid
We prove that the external activity complex of a matroid
is shellable. In fact, we show that every linear extension of LasVergnas's
external/internal order on provides a shelling of
. We also show that every linear extension of LasVergnas's
internal order on provides a shelling of the independence complex
. As a corollary, and have the same -vector.
We prove that, after removing its cone points, the external activity complex is
contractible if contains as a minor, and a sphere otherwise.Comment: Comments are welcom
Coxeter submodular functions and deformations of Coxeter permutahedra
We describe the cone of deformations of a Coxeter permutahedron, or
equivalently, the nef cone of the toric variety associated to a Coxeter
complex. This family of polytopes contains polyhedral models for the
Coxeter-theoretic analogs of compositions, graphs, matroids, posets, and
associahedra. Our description extends the known correspondence between
generalized permutahedra, polymatroids, and submodular functions to any finite
reflection group.Comment: Minor edits. To appear in Advances of Mathematic
Torsion zero cycles with modulus on affine varieties
In this note we show that given a smooth affine variety over an
algebraically closed field and an effective (possibly non reduced) Cartier
divisor on it, the Kerz-Saito Chow group of zero cycles with modulus is torsion free, except possibly for -torsion if the
characteristic of is . This generalizes to the relative setting
classical theorems of Rojtman (for smooth) and of Levine (for
singular). A stronger version of this result, that encompasses -torsion as
well, was proven with a different and more sophisticated method by A. Krishna
and the author in another paper.Comment: Final version. 12 pages, exposition improved. Several gaps in the
proofs fixe
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