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A bootstrap paradox, also known as an information loop, an information paradox, [6] an ontological paradox, [7] or a "predestination paradox" is a paradox of time travel that occurs when any event, such as an action, information, an object, or a person, ultimately causes itself, as a consequence of either retrocausality or time travel.
The free-fall time is the characteristic time that would take a body to collapse under its own gravitational attraction, if no other forces existed to oppose the collapse.. As such, it plays a fundamental role in setting the timescale for a wide variety of astrophysical processes—from star formation to helioseismology to supernovae—in which gravity plays a dominant ro
The time traveler's actions may be the cause of events in their own past though, which leads to the potential for circular causation, sometimes called a predestination paradox, [95] ontological paradox, [96] or bootstrap paradox. [96] [97] The term bootstrap paradox was popularized by Robert A. Heinlein's story "By His Bootstraps". [98]
Bootstrap 3 features new plugin system with namespaced events. Bootstrap 3 dropped Internet Explorer 7 and Firefox 3.6 support, but there is an optional polyfill for these browsers. [13] Bootstrap 3 was also the first version released under the twbs organization on GitHub instead of the Twitter one. [14]
Creates a collapsible box that allows its content to be hidden or revealed on user's command. It is used to reduce clutter. Template parameters [Edit template data] Parameter Description Type Status Contents 1 content text Contents of the box Content required Title 2 title heading header reason result Text of title bar. Defaults to "Extended contents". Default Extended content String suggested ...
Retrocausality, or backwards causation, is a concept of cause and effect in which an effect precedes its cause in time and so a later event affects an earlier one. [1] [2] In quantum physics, the distinction between cause and effect is not made at the most fundamental level and so time-symmetric systems can be viewed as causal or retrocausal.
The Jeans mass is named after the British physicist Sir James Jeans, who considered the process of gravitational collapse within a gaseous cloud. He was able to show that, under appropriate conditions, a cloud, or part of one, would become unstable and begin to collapse when it lacked sufficient gaseous pressure support to balance the force of gravity.
The stability of neoclassical tearing modes (NTM) is a key issue for magnetic configurations with a strong bootstrap current. The NTM is a metastable mode; in certain plasma configurations, a sufficiently large deformation of the bootstrap current produced by a “seed island” can contribute to the growth of the island.