Titlebook: Back-in-Time and Faster-than-Light Travel in General Relativity; Serguei Krasnikov Book 2018 Springer International Publishing AG, part of

allergen

善于骗人

斗争

Primordial WormholeWe demonstrate—and this is one of the main results of this book—that there are primordial wormholes whose ‘traversability time’, though small, is macroscopic.

ovation

不能根除

inscribe

Physical Predilectionsmoothness requirements—being questioned now and then. So, it is important that there is almost a consensus on the validity of a few meta principles that restrict the arbitrariness of possible modifications. Sometimes these principles are explicitly formulated—differently by each author—but much more

思乡病

昏迷状态

Time Travel Paradoxesradoxes seem to be something inherent to time machines (their main attribute, perhaps). On the other hand, the (supposed) paradoxicalness of time travel is traditionally the main objection against it and a good pretext for dismissing causality violating spacetimes from consideration. Recall, however

Feckless

Aids209

At and Beyond the Horizon into account. Likewise, classically there is nothing impossible in its transformation into a time machine. It remains to check that there are no known . effects that would protect causality after all.