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On continuous images of ultra-arcs

机译:在超弧的连续图像上

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Any space homeomorphic to one of the standard subcontinua of the Stone-tech remainder of the real half-line is called an ultra-arc. Alternatively, an ultra-arc may be viewed as an ultracopower of the real unit interval via a free ultrafilter on a countable set. It is known that any continuum of weight = N-1 is a continuous image of any ultra-arc; in this paper we address the problem of which continua are continuous images under special maps. Here are some of the results we present.Every nondegenerate locally connected chainable continuum of weight = N-1 is a co-elementary monotone image of any ultra-arc.Every nondegenerate chainable metric continuum is a co-existential image of any ultra-arc.Every chainable continuum of weight N-1, is a co-existential image of any ultra-arc whose indexing ultrafilter is a Fubini product of two free ultrafilters.There is a family of continuum-many topologically distinct nonchainable metric continua, each of which is a co-existential image of any ultra-arc.A nondegenerate continuum which is either a monotone or a co-existential image of an ultra-arc cannot be aposyndetic let alone locally connected without being a generalized arc. (C) 2019 Elsevier B.V. All rights reserved.
机译:任何空间同样为实际半线的石科技剩余的标准子通量之一的空间都被称为超弧。或者,可以通过可数套件上的自由超滤器观察超电弧作为真实单元间隔的超驱动器。众所周知,任何重量<= N-1的连续值是任何超弧的连续图像;在本文中,我们解决了在特殊地图下的连续图像的问题。以下是我们所呈现的一些结果。然而,每种非局部连接的可连续的重量<= n-1是任何超弧形的共源单调图像。每种非弧链可链式度量连续体是任何超出的共同存在形象。 Arc.ERCEVERY的重量连续的重量N-1,是任何超弧的共存图像,其索引超液是两个免费超滤器的FUBINI产品。总是一系列连续性 - 许多拓扑上独特的非收核,每一个这是任何超弧形的共存在的图像。一种非弧形的连续体,其是单调的或超弧的共存在图像不能是aposyndetic,但在本地连接的情况下,而不是广义的弧形。 (c)2019 Elsevier B.v.保留所有权利。

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