A Lagrangian for flat domain walls in spaces with Cartan torsion and electromagnetic fields is proposed.The Lagrangian is very similar to a recently proposed Lagrangian for domain walls in a Chern-Simons electrodynamics in 2+1 dimensions.We show that in the first approximation of the torsion scalar potential the field equations are reduced to a Klein-Gordon type field equation for the torsion p...

Given a λ-regular SU(2) or SL(2,C)-representation of a knot group, we show a relationship between a zero of acyclic Reidemeister torsion and non-acyclic Reidemeister torsion. Then we can give a method to calculate non-abelian twisted Reidemeister torsion of its knot exterior. We calculate some examples and investigate the behavior of non-abelian SU(2)-twisted Reidemeister torsion associated to ...

Gallbladder torsion is a rare entity. Recently, laparoscopic cholecystectomy has become accepted as a standard operation for gallbladder torsion. Unfortunately, kyphoscoliosis is a risk factor of gallbladder torsion, and kyphoscoliosis results in a low-lying costal arch and disturbs the laparoscopic view. The present paper reports a new surgical procedure, a "rib-lifting method" for retracting ...

Given a λ-regular SU(2) or SL(2,C)-representation of a knot group, we show how to calculate non-abelian twisted Reidemeister torsion of its knot exterior. This method is due to considering the relationship between a zero of acyclic Reidemeister torsion and non-acyclic Reidemeister torsion. We calculate some examples and investigate the behavior of non-abelian SU(2)-twisted Reidemeister torsion ...

In the presence of a curved space-time with torsion, the divergence of the leptonic current gets new contributions from the curvature and the torsion in addition to those coming from the electroweak fields. However it is possible to define a new lepton current which is gauge and local Lorentz invariant whose divergence gets no contribution from the torsion. Therefore we argue that torsion does ...

Left upper lobe torsion occurred in a woman during the first 24 hours following left lower lobectomy for bronchogenic carcinoma resection. To our knowledge, this is the first report of left upper lobe torsion. When atypical chest pain or opacification of the remaining lung develops following resectional surgery, torsion of the remaining lung must be suspected. Prompt diagnosis and treatment may...

In the present paper, we provide general bounds for the torsion in the codimension 2 Chow groups of the products of projective homogeneous surfaces. In particular, we determine the torsion for the product of four Pfister quadric surfaces and the maximal torsion for the product of three Severi-Brauer surfaces. We also find an upper bound for the torsion of the product of three quadric surfaces w...

We classify 7-dimensional cocalibrated G2-manifolds with parallel characteristic torsion and non-abelian holonomy. All these spaces admit a metric connection ∇ with totally skew-symmetric torsion and a spinor field Ψ1 solving the equations in the common sector of type II superstring theory. There exist G2-structures with parallel characteristic torsion that are not naturally reductive. 1. Metri...

The issues of quintessence and cosmic acceleration can be discussed in the framework of higher order curvature and torsion theories of gravity. We can define effective pressure and energy density directly connected to the curvature or to the torsion fields and then ask for the conditions to get an accelerated expansion. Exact accelerated expanding solutions can be achieved for several fourth or...

A recent study by Poljac et al. [Poljac, E., Lankheet, M. J. M., & van den Berg, A. (2005). Perceptual compensation for eye torsion. Vision Research, 45(4), 485-496] concluded that there was complete perceptual compensation for ocular torsion, although they did not directly measure ocular torsion. Using a similar eccentric-gaze paradigm to induce changes in torsion, which were directly measured...