**In their recently published Letter in Journal of Physics A: Mathematical and Theoretical researchers from the University of Adelaide have provided a topological classification scheme for generalized Weyl semimetals. ** 789 more words

## Tags » Mathematical Physics

#### 3D topological semimetals

#### Deformed Numbers and Calculus

When I first heard of fractional calculus, I thought that it sounds contrived. But then again, so are many abstractions and generalizations of established ideas in mathematics. 705 more words

#### Noether symmetries and stability of ideal gas solution in Galileon Cosmology [CL]

http://arxiv.org/abs/1702.01603

A class of generalized Galileon cosmological models, which can be described by a point-like Lagrangian, is considered in order to utilize Noether’s Theorem to determine conservation laws for the field equations. 62 more words

#### Inflationary $α$-attractor cosmology: A global dynamical systems perspective [CL]

http://arxiv.org/abs/1702.00306

We study flat FLRW $\alpha$-attractor $\mathrm{E}$- and $\mathrm{T}$-models by introducing a dynamical systems framework that yields regularized unconstrained field equations on two-dimensional compact state spaces. 119 more words

#### Exact collisional plasma fluid theories [CL]

http://arxiv.org/abs/1701.08037

An expansion of the velocity space distribution functions in terms of multi-index Hermite polynomials is carried out to derive a consistent set of collisional fluid equations for plasmas. 124 more words