Results 21 to 30 of about 245,916 (239)
Loops, Surfaces and Grassmann Representation in Two- and Three-Dimensional Ising Models [PDF]
, 1998 Starting from the known representation of the partition function of the 2- and 3-D Ising models as an integral over Grassmann variables, we perform a hopping expansion of the corresponding Pfaffian.
C. R. GATTRINGER +3 more
core +3 more sources
Mathematics, 2020 Fractional calculus is widely used in engineering fields. In complex mechanical systems, multi-body dynamics can be modelled by fractional differential-algebraic equations when considering the fractional constitutive relations of some materials.
Yongpeng Tai +4 more
doaj +1 more source
Moduli Spaces of Higher Spin Klein Surfaces [PDF]
, 2016 We study the connected components of the space of higher spin bundles on hyperbolic Klein surfaces. A Klein surface is a generalisation of a Riemann surface to the case of non-orientable surfaces or surfaces with boundary.
Natanzon, Sergey, Pratoussevitch, Anna
core +2 more sources
On the determination of shifting operators along geodesics on a surface [PDF]
Theoretical and Applied Mechanics, 2013 A procedure to obtain a closed form of the shifting operators along a known geodesic line on a surface as a solution of a system of linear algebraic equations is proposed.
Drašković Zoran
doaj +1 more source
Investigation of the existence domain for Dyakonov surface waves in the Sage computer algebra system
Discrete and Continuous Models and Applied Computational Science, 2021 Surface electromagnetic waves (Dyakonov waves) propagating along a plane interface between an isotropic substance with a constant dielectric constant and an anisotropic crystal, whose dielectric tensor has a symmetry axis directed along the interface ...
Oleg K. Kroytor
doaj +1 more source
Indecomposable $K_1$ classes on a Surface and Membrane Integrals
Comptes Rendus. Mathématique, 2020 Let $X$ be a projective algebraic surface. We recall the $K$-group $K_{1,\mathrm{ind}}^{(2)}(X)$ of indecomposables and provide evidence that membrane integrals are sufficient to detect these indecomposable classes.
Chen, Xi +2 more
doaj +1 more source
Comptes Rendus. Mécanique, 2023 Reduction of a Bessel integral solution for the average transient temperature change at the surface of a constant flux thermal source/sink of circular disk aspect embedded in an otherwise insulating plane boundary of a homogeneous, isotropic, and ...
Pons, William, Pons, Stanley
doaj +1 more source
Parametrization of translational surfaces
, 2014 The algebraic translational surface is a typical modeling surface in computer aided design and architecture industry. In this paper, we give a necessary and sufficient condition for that algebraic surface having a standard parametric representation and ...
Perez-Diaz, Sonia, Shen, Liyong
core +1 more source
Computational efficiency for the surface renewal method [PDF]
Atmospheric Measurement Techniques, 2018 Measuring surface fluxes using the surface renewal (SR) method requires programmatic algorithms for tabulation, algebraic calculation, and data quality control.
J. Kelley, C. Higgins
doaj +1 more source
Geometry of some twistor spaces of algebraic dimension one
Complex Manifolds, 2015 It is shown that there exists a twistor space on the n-fold connected sum of complex projective planes nCP2, whose algebraic dimension is one and whose general fiber of the algebraic reduction is birational to an elliptic ruled surface or a K3 surface ...
Honda Nobuhiro
doaj +1 more source