Results 91 to 100 of about 166,080,641 (165)
Scandinavian Journal of Statistics, Volume 53, Issue 3, Page 1343-1357, September 2026.ABSTRACT A possibly time‐dependent transition intensity matrix or generator (Q(t))$$ \left(Q(t)\right) $$ characterizes the law of a Markov jump process (MP). For a time‐homogeneous MP, the transition probability matrix (TPM) can be expressed as a matrix exponential of Q$$ Q $$.
Dario Gasbarra +2 more
wiley +1 more source
A ferritin prediction model to determine individual blood donation frequencies
Transfusion, Volume 66, Issue 9, Page 1768-1776, September 2026.Abstract Background Ferritin‐guided donation intervals are effective in reducing iron deficiency and low hemoglobin rates. However, many donors still present with low ferritin levels after multiple donations, which results in less donor availability. Model predictions of ferritin levels can help in setting donation frequencies that, proactively, keep ...
Mart Pothast +3 more
wiley +1 more source
Isometric immersions into three‐dimensional unimodular metric Lie groups
Journal of the London Mathematical Society, Volume 114, Issue 3, September 2026.Abstract We study isometric immersions of surfaces into simply connected three‐dimensional unimodular Lie groups endowed with either Riemannian or Lorentzian left‐invariant metrics, assuming that Milnor's operator is diagonalizable in the Lorentzian case.
Ildefonso Castro +2 more
wiley +1 more source
Subgroup separability, knot groups, and graph manifolds
, 2001 This paper answers a question of Burns, Karrass and Solitar by giving examples of knot and link groups which are not subgroup-separable. For instance, it is shown that the fundamental group of the square knot complement is not subgroup separable.
Wise, Daniel T., Niblo, Graham A.
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Expansion of ODE solutions into transseries [PDF]
, 2018 : We consider a polynomial ODE of the order n in a neighbourhood of zero or of infinity of the independent variable. A method of calculation of its solutions in the form of power series and an exponential addition, which contains one more power
Bruno A.D. http://library.keldysh.ru/author_page.asp?aid=1428
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Partie des Etats Unis [ : Mississippi and portions of Alabama, Louisiana, etc.] : Amer. Sep. No. 56
Relief shown by hachures.; Shows settlements, trails, areas of Indian habitation by tribe, and physical features.; Prime meridian: Paris; In upper margin: Am. Sep.
Vandermaelen, Philippe, 1795-1869.
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The construction of Frobenius manifolds from KP tau-functions
, 1998 Frobenius manifolds (solutions of WDVV equations) in canonical coordinates are determined by the system of Darboux--Egoroff equations. This system of partial differential equations appears as a specific subset of the $n$-component KP hierarchy.
van de Leur, J.W., Martini, Ruud
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Data-driven, ML-assisted approaches to problem well-posedness. [PDF]
PNAS NexusBertalan T +5 more
europepmc +1 more source
Geometric Neural Ordinary Differential Equations: From Manifolds to Lie Groups. [PDF]
Entropy (Basel)Wotte YP, Califano F, Stramigioli S.
europepmc +1 more source
EXPLICIT STRONG SOLUTIONS OF MULTIDIMENSIONAL STOCHASTIC DIFFERENTIAL EQUATIONS [PDF]
Herein, we characterize strong solutions of multidimensional stochastic differential equations (formula) that can be represented locally as (formula) where W is an multidimensional Brownian motion and U, (symbole) are continuous functions. Assuming that (
BRUNO REMILLARD, MICHAEL A. KOURITZIN
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