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48 results for Clifford-Wolf translations

In this paper, we study Clifford-Wolf translations of Finsler spaces. We first give a characterization of Clifford-Wolf translations of Finsler spaces in terms of Killing vector fields. In particular, we show that there is a natural correspondence between Clifford-Wolf translations and the Killing vector fields of cons…

2012-01-18abs ↗pdf ↗

A Clifford-Wolf translation of a connected Finsler space is an isometry which moves each point the sam distance. A Finsler space (M,F)(M, F) is called Clifford-Wolf homogeneous if for any two point x1,x2Mx_1, x_2\in M there is a Clifford-Wolf translation ρρ such that ρ(x1)=x2ρ(x_1)=x_2. In this paper, we study Clifford-Wolf transl…

2012-04-23abs ↗pdf ↗

A Clifford-Wolf translation of a connected Finsler space is an isometry which moves each point the same distance. A Finsler space (M,F)(M, F) is called Clifford-Wolf homogeneous if for any two points x1,x2Mx_1, x_2\in M there is a Clifford-Wolf translation ρρ such that ρ(x1)=x2ρ(x_1)=x_2. In this paper, we give a complete classifi…

2012-06-14abs ↗pdf ↗

In this paper, we study Clifford-Wolf translations of homogeneous Randers metrics on spheres. It turns out that we can present a complete description of all the Clifford-Wolf translations of all the homogeneous Randers metrics on spheres. The most important point of this paper is that a new phenomena surfaces. Namely, …

2012-04-23abs ↗pdf ↗

An isometry of a Finsler space is called Clifford-Wolf translation (CW-translation) if it moves all points the same distance. A Finsler space (M,F)(M, F) is called Clifford-Wolf homogeneous (CW-homogeneous) if for any x,yMx, y\in M there is a CW-translation σσ such that σ(x)=yσ(x)=y. We prove that if FF is a homogeneous Finsl…

2013-12-03abs ↗pdf ↗

This paper has been withdrawn by the author due to a crucial sign error in equation 1. An isometry ρρ of a connected Finsler space (M,F)(M, F) is called bounded if the function d(x,ρ(x))d(x, ρ(x)) is bounded on MM. It is called a Clifford-Wolf translation if the function d(x,ρ(x))d(x, ρ(x)) is constant on MM. In this paper, we prove…

2012-04-23abs ↗pdf ↗

In this paper, we introduce a new type of Finsler metrics, called (α1,α2)(α_1,α_2)-metrics. We define the notion of the good datum of a homogeneous (α1,α2)(α_1,α_2)-metric and use that to study the geometric properties. In particular, we give a formula of the S-curvature and deduce a condition for the S-curvature to be vanishing…

2014-01-02abs ↗pdf ↗

In this paper, using connections between Clifford-Wolf isometries and Killing vector fields of constant length on a given Riemannian manifold, we classify simply connected Clifford-Wolf homogeneous Riemannian manifolds. We also get the classification of complete simply connected Riemannian manifolds with the Killing pr…

2008-03-31abs ↗pdf ↗

Study on rigidity of translating hypersurfaces not in graphical direction.

problem Rigidity of translating hypersurfaces not in graphical direction.
method Proved rigidity results for complete graphical translating hypersurfaces under specific conditions.
result Entire graphical translating surfaces are flat under certain conditions.

Forward translation improves neural machine translation for sentences originally in source language.

problem Improving neural machine translation quality using synthetic data.
method Case study with French-English news translation, separating test sets by original language, analyzing domains, translationese, and noise.
result Forward translation delivers superior gains on sentences originally in source language, complementing back-translation on target language sentences.

The natural automorphism group of a translation surface is its group of translations. For finite translation surfaces of genus g > 1 the order of this group is naturally bounded in terms of g due to a Riemann-Hurwitz formula argument. In analogy with classical Hurwitz surfaces, we call surfaces which achieve the maxima…

2013-11-28abs ↗pdf ↗

Study on stable translation lengths of surface homeomorphisms and their approximations.

problem Understanding stable translation lengths of homeomorphisms and their finite approximations.
method Comparing stable translation lengths of homeomorphisms and their finite approximations on curve graphs.
result Stable translation length of homeomorphisms with dense periodic points equals the supremum of their approximations.

Study measures gender bias in machine translation using multiple reference points.

problem Measuring and identifying gender bias in machine translation.
method Used an optimal non-biased translator, reference points from occupational statistics and survey.
result Found bias against both genders, but more against women, and found occupations have a greater effect than adjectives.

This paper uses LLMs and cycle consistency for better machine translation evaluation.

problem Evaluating translation quality and LLM capabilities without ground truth.
method Generate translation candidates, back-translate, and evaluate cycle consistency.
result Larger LLMs or more inference passes improve cycle consistency.

Paper finds a non-existence theorem for certain translators in high dimensions.

problem Non-existence of certain translators in high-dimensional spaces.
method Developed a non-existence theorem and found an example of a translator.
result Non-existence of entire Qn1Q_{n-1}-translators in Rn+1\mathbb{R}^{n+1}.

Constructing translating solitons from Lagrangian Grim Reapers.

problem Creating Lagrangian translating solitons from intersections of Grim Reapers.
method Desingularizing intersections with special Lagrangian Lawlor necks.
result Constructing Lagrangian translating solitons with multiple ends and loops.

Study on singular points of translation surfaces under linearly dependent conditions.

problem Investigate singular points of translation surfaces under linearly dependent conditions.
method Use theories of generalised framed surfaces and framed surfaces.
result Introduce translation generalised framed surfaces and investigate their singular points.

In this article we prove two non-existence results for translating solitons of the mean curvature flow (translators for short) in Rm+1\mathbb{R}^{m+1}. We also obtain an upper bound to the maximum height that a compact embedded translator in R3\mathbb{R}^{3} can achieve. On the other hand, we study graphical perturbation…

2016-01-27abs ↗pdf ↗

Neural machine translation is a recently proposed approach to machine translation. Unlike the traditional statistical machine translation, the neural machine translation aims at building a single neural network that can be jointly tuned to maximize the translation performance. The models proposed recently for neural ma…

2014-09-01abs ↗pdf ↗

Study invariant λλ-translators in Lorentz-Minkowski space.

problem Characterize λλ-translators invariant under translations and rotations.
method Analyze 1-parameter group of translations and rotations, find explicit parametrizations, and solve non-linear autonomous systems.
result Explicit parametrizations and qualitative properties of invariant λλ-translators.

Study classifies and characterizes translators in hyperbolic static universe.

problem Classifying and characterizing translators in hyperbolic static universe.
method Classified and characterized translators foliated by horospheres and rotationally invariant ones, both space-like and time-like.
result Obtained a characterization of the bowl and certain translators foliated by horospheres.

The study proves stability of various graphical translators in mean curvature flow.

problem Stability of graphical translators in mean curvature flow.
method Existence of longtime solution to mean curvature flow, dynamical stability results for various graphical translators.
result Dynamical stability of various types of graphical translators.

Study translators in Generalised Robertson-Walker spacetimes, identifying warping functions and classifying examples.

problem Understanding translators in Generalised Robertson-Walker spacetimes.
method Analyzing translators as submanifolds satisfying the mean curvature flow equation with a specific vector field.
result Identification of three one-parameter families of warping functions and classification of translators.

The paper shows how integrating categorical semantics can enhance unsupervised domain translation.

problem Improving unsupervised domain translation between perceptually different domains.
method Learning invariant categorical semantic features in an unsupervised manner and conditioning them on the style encoder.
result Conditioning the style encoder on learned categorical semantics improves translation and stylization.

African languages are numerous, complex and low-resourced. The datasets required for machine translation are difficult to discover, and existing research is hard to reproduce. Minimal attention has been given to machine translation for African languages so there is scant research regarding the problems that arise when …

2019-06-11abs ↗pdf ↗

Study shows only grim reaper cylinder for certain self-translating surfaces.

problem Characterizing self-translating surfaces in 3D space.
method Used parabolicity in a weighted setting and universally L-superharmonic functions.
result Characterized the grim reaper cylinder as the only finite entropy self-translating 2-surface in R^3 of width π and bounded from below.

We study volume growth, entropy and stability for translating solitons of mean curvature flow. First, we prove that every complete properly immersed translator has at least linear volume growth. Then, by using Huisken's monotonicity formula, we compute the entropy of the grim reaper and the bowl solitons. We also give …

2016-12-15abs ↗pdf ↗

We introduce and describe the results of a novel shared task on bandit learning for machine translation. The task was organized jointly by Amazon and Heidelberg University for the first time at the Second Conference on Machine Translation (WMT 2017). The goal of the task is to encourage research on learning machine tra…

2017-07-27abs ↗pdf ↗