Zobrazeno 1 - 10
of 1 248
pro vyhledávání: '"A Ehrenborg"'
Autor:
Ehrenborg, Richard
We are interested in conjecturing the sign of the pizza quantity P(H,B(a,R)) for the irreducible Coxeter arrangements H of type A_n, where n=2,3 bmod 4, and type D_n, where n is odd. Our approach is to express the pizza quantity in terms of the pizza
Externí odkaz:
http://arxiv.org/abs/2410.13593
Autor:
Ehrenborg, Richard
Using the cyclotomic identity we compute sums over d-tuples of monic polynomials in F_q[x] weighted by the multiplicity of their irreducible factors. As consequences we determine explicit expressions for the number of d-tuples of polynomials such tha
Externí odkaz:
http://arxiv.org/abs/2410.12058
Autor:
Ehrenborg, Richard, Hetyei, Gábor
We study the poset of d-indivisible noncrossing partitions introduced by M\"uhle, Nadeau and Williams. These are noncrossing partitions such that each block has cardinality 1 modulo d and each block of the dual partition also has cardinality 1 modulo
Externí odkaz:
http://arxiv.org/abs/2407.08577
Autor:
Ehrenborg, Richard
Publikováno v:
Discrete Mathematics 347 (2024) 114127
We present two classes of level Eulerian posets. Both classes contain intervals of rank k+1 whose cd-index is the sum over all cd-monomials w of degree k and the coefficient of the monomial w is r to the power of the number of d's in w. We also show
Externí odkaz:
http://arxiv.org/abs/2406.10080
We study two classes of permutations intimately related to the visual proof of Spitzer's lemma and Huq's generalization of the Chung-Feller theorem. Both classes of permutations are counted by the Fuss-Catalan numbers. The study of one class leads to
Externí odkaz:
http://arxiv.org/abs/2310.06288
Shellsort is a sorting method that is attractive due to its simplicity, yet it takes effort to analyze its efficiency. The heart of the algorithm is the gap sequence chosen a priori and used during sorting. The selection of this gap sequence affects
Externí odkaz:
http://arxiv.org/abs/2301.00316
Autor:
Katarina Steding‐Ehrenborg, Anders Nelsson, Erik Hedström, Henrik Engblom, Annika Ingvarsson, Johan Nilsson, Oscar Braun, Håkan Arheden
Publikováno v:
Journal of the American Heart Association: Cardiovascular and Cerebrovascular Disease, Vol 13, Iss 11 (2024)
Background The geometrical relationship between atrial and ventricular short‐axis cross‐sectional area determines the hydraulic forces acting on intracardiac blood. This is important for diastolic filling. In patients undergoing heart transplanta
Externí odkaz:
https://doaj.org/article/399e7b146f644651b8754514b049ee5d
Autor:
Ehrenborg, Nicholas, Davis, Connor, Tremoulis, Jacob, Bussert, Brett R., Cheney, Nicholas A., O’Connor, Patrick M.
Publikováno v:
In Journal of Orthopaedics September 2024 55:11-15
Autor:
Magnus Lundin, Einar Heiberg, David Nordlund, Tom Gyllenhammar, Katarina Steding-Ehrenborg, Henrik Engblom, Marcus Carlsson, Dan Atar, Jesper van der Pals, David Erlinge, Rasmus Borgquist, Ardavan Khoshnood, Ulf Ekelund, Jannike Nickander, Raquel Themudo, Sabrina Nordin, Rebecca Kozor, Anish N. Bhuva, James C. Moon, Eva Maret, Kenneth Caidahl, Andreas Sigfridsson, Peder Sörensson, Erik B. Schelbert, Håkan Arheden, Martin Ugander
Publikováno v:
Scientific Reports, Vol 13, Iss 1, Pp 1-15 (2023)
Abstract Cardiovascular magnetic resonance (CMR) can accurately measure left ventricular (LV) mass, and several measures related to LV wall thickness exist. We hypothesized that prognosis can be used to select an optimal measure of wall thickness for
Externí odkaz:
https://doaj.org/article/731c84b925f342cbb059414a59be7d39
Autor:
Emil Westerlund, Sigurður E. Marelsson, Michael Karlsson, Fredrik Sjövall, Imen Chamkha, Eleonor Åsander Frostner, Johan Lundgren, Vineta Fellman, Erik A. Eklund, Katarina Steding-Ehrenborg, Niklas Darin, Gesine Paul, Magnus J. Hansson, Johannes K. Ehinger, Eskil Elmér
Publikováno v:
Heliyon, Vol 10, Iss 5, Pp e26745- (2024)
There is a growing interest for the possibility of using peripheral blood cells (including platelets) as markers for mitochondrial function in less accessible tissues. Only a few studies have examined the correlation between respiration in blood and
Externí odkaz:
https://doaj.org/article/744a06f443954b8d975111204dbfd9ca