Time Machines with Non-compactly Generated Cauchy Horizons and ``Handy Singularities"

TL;DR

This paper explores how 'handy singularities' can be used to construct time machines, avoiding common issues, with a simple method and examples provided.

Contribution

It introduces a new approach using handy singularities for creating time machines, expanding the theoretical framework and providing explicit examples.

Findings

Handy singularities can be employed to build time machines.

A simple construction method for such singularities is proposed.

Several 3D examples demonstrate the approach.

Abstract

The use of "handy singularities" (i.e. singularities similar to those arising in the Deutch-Politzer space) enables one to avoid (almost) all known difficulties inherent usually to creation of time machines. A simple method is discussed for constructing a variety of such singularities. A few 3-dimensional examples are cited.