Zobrazeno 1 - 10
of 7 801
pro vyhledávání: '"Spink, A"'
We develop a quasisymmetric analogue of the theory of Schubert cycles, building off of our previous work on a quasisymmetric analogue of Schubert polynomials and divided differences. Our constructions result in a natural geometric interpretation for
Externí odkaz:
http://arxiv.org/abs/2410.12643
We give an elementary approach utilizing only the divided difference formalism for obtaining expansions of Schubert polynomials that are manifestly nonnegative, by studying solutions to the equation $\sum Y_i\partial_i=\mathrm{id}$ on polynomials wit
Externí odkaz:
http://arxiv.org/abs/2407.02375
We develop a quasisymmetric analogue of the combinatorial theory of Schubert polynomials and the associated divided difference operators. Our counterparts are "forest polynomials", and a new family of linear operators, whose theory of compositions is
Externí odkaz:
http://arxiv.org/abs/2406.01510
Delta-matroids are "type B" generalizations of matroids in the same way that maximal orthogonal Grassmannians are generalizations of Grassmannians. A delta-matroid analogue of the Tutte polynomial of a matroid is the interlace polynomial. We give a g
Externí odkaz:
http://arxiv.org/abs/2307.02550
Autor:
Elliot Howard-Spink, Misato Hayashi, Tetsuro Matsuzawa, Daniel Schofield, Thibaud Gruber, Dora Biro
Publikováno v:
PeerJ, Vol 12, p e18484 (2024)
Many of the complex behaviours of humans involve the production of nonadjacent dependencies between sequence elements, which in part can be generated through the hierarchical organization of sequences. To understand how these structural properties of
Externí odkaz:
https://doaj.org/article/496f6b7ceb9a4c848061ff2e2ca601b0
Publikováno v:
EJNMMI Physics, Vol 11, Iss 1, Pp 1-13 (2024)
Abstract Background Dosimetry after [177Lu]Lu-DOTA-TATE therapy can be demanding for both patients and the clinical service due to the need for imaging at several time points. In this work we compare three methods of single time point (STP) kidney do
Externí odkaz:
https://doaj.org/article/c4732775f4ab4c1d93ad07ed8e027d00
Autor:
Maximilian M. Delsmann, Julian Delsmann, Nico Maximilian Jandl, Kai-Jonathan Maas, Frank Timo Beil, Michael Amling, Frank Oliver Henes, Tim Rolvien, Clemens Spink
Publikováno v:
Scientific Reports, Vol 14, Iss 1, Pp 1-9 (2024)
Abstract To determine the diagnostic yield of cone beam computed tomography (CBCT) compared with 3 T magnetic resonance imaging (MRI) for the evaluation of subchondral insufficiency fractures of the knee. Consecutive patients with subchondral insuffi
Externí odkaz:
https://doaj.org/article/b3a07e9d923c40b8a701b3342de0b0b7
The first version of digital low level RF (DLLRF) for the Diamond Light Source storage ring and booster was developed with ALBA Synchrotron. Six systems have been built so far. Two of them are in routine operation controlling two normal conducting HO
Externí odkaz:
http://arxiv.org/abs/2210.03576
Autor:
Dembner, Spencer, Spink, Hunter
Let $X \subset \mathbb{C}^n$ be an algebraic variety, and let $\Lambda \subset \mathbb{C}^n$ be a discrete subgroup whose real and complex spans agree. We describe the topological closure of the image of $X$ in $\mathbb{C}^n / \Lambda$, thereby exten
Externí odkaz:
http://arxiv.org/abs/2209.10812
We establish a connection between the algebraic geometry of the type B permutohedral toric variety and the combinatorics of delta-matroids. Using this connection, we compute the volume and lattice point counts of type B generalized permutohedra. Appl
Externí odkaz:
http://arxiv.org/abs/2209.06752