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A locally-built, LLM-digested index of recent arXiv papers in quant finance, geometry/topology, and statistical ML — keyword search served straight from SQLite on this machine.

168,742 papers · 148 categories

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19 results for H-space

In this paper, we continue studying the 6-dimensional pseudo-Riemannian space V^6(g_{ij}) with signature [++--], which admits projective motions, i. e. continuous transformation groups preserving geodesics. In particular, we determine a necessary and sufficient condition that the 6-dimensional rigid h-spaces have const…

2003-01-10abs ↗pdf ↗

The space of metrics with positive Ricci curvature on spheres has special algebraic structures.

problem Understanding the space of metrics with positive Ricci curvature on spheres.
method Using H-space and loop space structures, and operad theory.
result The space of metrics with positive Ricci curvature on spheres is homotopy equivalent to an n-fold loop space.

We present a geometric approach to the field theory with higher order anisotropic interactions. The concepts of higher order space, or locally anisotropic, space (in brief, h-space, or la-space) are introduced as general ones for various types of higher order extensions of Lagrange and Finsler geometry and higher dimen…

1996-11-09abs ↗pdf ↗

We study the six-dimensional pseudo-Riemannian spaces with two time-like coordinates that admit non-homothetic infinitesimal projective transformations. The metrics are manifestly obtained and the projective group properties are determined. We also find a generic defining of projective motion in the 6-dimensional rigid…

2005-06-24abs ↗pdf ↗

By a theorem of Kirchhoff if the six sphere admits an almost complex structure then the seven sphere is parallelizable, more crucial, he exhibited an explicit global frame constructed out of the given almost complex structure. This result implicitly equips the seven sphere with a definite H-space multiplication. We pro…

2018-04-16abs ↗pdf ↗

We prove that the Grothendieck-Springer simultaneous resolution viewed as a correspondence between the adjoint quotient of a Lie algebra and its maximal torus is Lagrangian in the sense of shifted symplectic structures. As Hamiltonian spaces can be interpreted as Lagrangians in the adjoint quotient, this allows one to …

2014-11-11abs ↗pdf ↗

In this paper we study Morse homology and cohomology with local coefficients, i.e. "twisted" Morse homology and cohomology, on closed finite dimensional smooth manifolds. We prove a Morse theoretic version of Eilenberg's Theorem, and we prove isomorphisms between twisted Morse homology, Steenrod's CW-homology with loca…

2019-11-18abs ↗pdf ↗

New probabilistic invariants bound classical topological complexity and category.

problem Bounding classical topological complexity and category.
method Developed probabilistic variants of one-category and diagonal topological complexity.
result Identified new invariants with distributional category and complexity on Eilenberg-Mac Lane spaces.

New operations defined on moduli spaces for bundles with orientations.

problem Pushforward operations for principal bundles with orientations.
method Developed a general theory of pushforward operations for principal GG-bundles, constructing specific operations for G=BU(1)G=BU(1).
result Classified all stable pushforward operations and showed they are generated by the projective Euler and rank operations.

Let f:A-->B be a covering map. We say A has e filtered ends with respect to f (or B) if for some filtration {K_n} of B by compact subsets, A - f^{-1}(K_n) "eventually" has e components. The main theorem states that if Y is a (suitable) free H-space, if K < H has infinite index, and if Y has a positive finite number of …

2005-12-04abs ↗pdf ↗

This is the second paper of two in a series under the same title ([CRX]); both study the quantitative volume space form rigidity conjecture: a closed nn-manifold of Ricci curvature at least (n1)H(n-1)H, H=±1H=\pm 1 or 00 is diffeomorphic to a HH-space form if for every ball of definite size on MM, the lifting ball on th…

2016-06-17abs ↗pdf ↗

Hrrformer uses HRR to speed up self-attention for long sequences.

problem Infeasibility of using transformers with very long sequence lengths.
method Re-cast self-attention using Holographic Reduced Representations (HRR).
result Achieves near state-of-the-art accuracy with O(THlogH)\mathcal{O}(T H \log H) time complexity and O(TH)\mathcal{O}(T H) space complexity.