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Time-travel
Time travel is the hypothetical activity of traveling into the past or future. Time travel is a concept in philosophy and fiction, particularly science fiction. In fiction, time travel is typically achieved through the use of a device known as a time machine. The idea of a time machine was popularized by H. G. Wells's 1895 novel ''The Time Machine''. It is uncertain whether time travel to the past would be physically possible. Such travel, if at all feasible, may give rise to questions of causality. Forward time travel, outside the usual sense of the perception of time, is an extensively observed phenomenon and is well understood within the framework of special relativity and general relativity. However, making one body advance or delay more than a few milliseconds compared to another body is not feasible with current technology. As for backward time travel, it is possible to find solutions in general relativity that allow for it, such as a rotating black hole. Traveling to ...
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Quantum Mechanics Of Time Travel
The theoretical study of time travel generally follows the laws of general relativity. Quantum mechanics requires physicists to solve equations describing how probabilities behave along closed timelike curves (CTCs), which are theoretical loops in spacetime that might make it possible to travel through time. In the 1980s, Igor Novikov proposed the self-consistency principle. According to this principle, any changes made by a time traveler in the past must not create historical paradoxes. If a time traveler attempts to change the past, the laws of physics will ensure that events unfold in a way that avoids paradoxes. This means that while a time traveler can influence past events, those influences must ultimately lead to a consistent historical narrative. However, Novikov's self-consistency principle has been debated in relation to certain interpretations of quantum mechanics. Specifically, it raises questions about how it interacts with fundamental principles such as unitarity a ...
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Time Travel In Fiction
Time travel is a common theme in fiction, mainly since the late 19th century, and has been depicted in a variety of media, such as literature, television, and film. The concept of time travel by mechanical means was popularized in H. G. Wells' 1895 story, ''The Time Machine''. In general, time travel stories focus on the consequences of traveling into the past or the future. The premise for these stories often involves changing history, either intentionally or by accident, and the ways by which altering the past changes the future and creates an altered present or future for the time traveler upon their return. In other instances, the premise is that the past cannot be changed or that the future is determined, and the protagonist's actions turn out to be inconsequential or intrinsic to events as they originally unfolded. Some stories focus solely on the paradoxes and alternate timelines that come with time travel, rather than time traveling. They often provide some sort of soci ...
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Science Fiction
Science fiction (often shortened to sci-fi or abbreviated SF) is a genre of speculative fiction that deals with imaginative and futuristic concepts. These concepts may include information technology and robotics, biological manipulations, space exploration, time travel, Parallel universes in fiction, parallel universes, and extraterrestrials in fiction, extraterrestrial life. The genre often explores human responses to the consequences of projected or imagined scientific advances. Science fiction is related to fantasy (together abbreviated wikt:SF&F, SF&F), Horror fiction, horror, and superhero fiction, and it contains many #Subgenres, subgenres. The genre's precise Definitions of science fiction, definition has long been disputed among authors, critics, scholars, and readers. Major subgenres include hard science fiction, ''hard'' science fiction, which emphasizes scientific accuracy, and soft science fiction, ''soft'' science fiction, which focuses on social sciences. Other no ...
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Wormhole
A wormhole is a hypothetical structure that connects disparate points in spacetime. It can be visualized as a tunnel with two ends at separate points in spacetime (i.e., different locations, different points in time, or both). Wormholes are based on a special Solutions of the Einstein field equations, solution of the Einstein field equations. More precisely they are a transcendental bijection of the spacetime continuum, an Asymptote, asymptotic projection of the Calabi–Yau manifold manifesting itself in anti-de Sitter space. Wormholes are consistent with the General relativity, general theory of relativity, but whether they actually exist is unknown. Many physicists postulate that wormholes are merely projections of a Four-dimensional space, fourth spatial dimension, analogous to how a two-dimensional (2D) being could experience only part of a three-dimensional (3D) object. In 1995, Matt Visser suggested there may be many wormholes in the universe if cosmic strings with negat ...
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Pāli Canon
The Pāḷi Canon is the standard collection of scriptures in the Theravada Buddhism, Buddhist tradition, as preserved in the Pāli language. It is the most complete extant Early Buddhist texts, early Buddhist canon. It derives mainly from the Tamrashatiya school. According to Buddhist tradition, during the First Buddhist Council, three months after the parinibbana of Gautama Buddha in Rajgir, Ananda recited the Sutta Piṭaka, Sutta Pitaka, and Upali recited the Vinaya Piṭaka, Vinaya Pitaka. The Arhats present accepted the recitations, and henceforth, the teachings were preserved orally by the Sangha. The Tipitaka that was transmitted to Sri Lanka during the reign of King Asoka was initially preserved orally and later written down on palm leaves during the Fourth Buddhist Council in 29 BC, approximately 454 years after the death of Gautama Buddha. The claim that the texts were "spoken by the Buddha" is meant in this non-literal sense. The existence of the Bhāṇaka tradi ...
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Vishnu Purana
The Vishnu Purana () is one of the eighteen Mahapuranas, a genre of ancient and medieval texts of Hinduism. It is an important Pancharatra text in the Vaishnavism literature corpus. The manuscripts of ''Vishnu Purana'' have survived into the modern era in many versions. More than any other major Purana, the ''Vishnu Purana'' presents its contents in ''Pancalaksana'' format – ''Sarga'' (cosmogony), ''Pratisarga'' (cosmology), ''Vamsa'' (genealogy of the gods and goddesses, sages and kings and queens), ''Manvantara'' (cosmic cycles), and ''Vamsanucarita'' (legends during the times of various kings and queens). Some manuscripts of the text are notable for not including sections found in other major Puranas, such as those on ''Mahatmyas'' and tour guides on pilgrimage, but some versions include chapters on temples and travel guides to sacred pilgrimage sites. The text is also notable as the earliest Purana to have been translated and published in 1840 CE by HH Wilson, based ...
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Kakudmi
Kakudmi (), also called Raivata ( meaning ''son of Revata''), is a king featured in Hindu literature. Kakudmi is described to be the king of Kushasthali. He is the son of Revata, and the father of Revati, the consort of the deity Balarama. His account is given within a number of texts such as the Mahabharata, the Harivamsha, the Devi Bhagavatam, and the Bhagavata Purana. Legend Audience with Brahma According to the Bhagavata Purana and the Vishnu Purana, Kakudmi's daughter, Revati, was so beautiful and accomplished that when she reached a marriageable age, she could find no man worthy of her. Hence, he went to Satyaloka to seek an audience with Brahma, to seek his advice about a suitable husband for his daughter. When the two arrived, Brahma was listening to a musical performance by the gandharvas Hāha and Hūhu, so they waited patiently until the performance was finished. Then, Kakudmi bowed humbly, and made his request, presenting his shortlist of candidates. Brahma s ...
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Brahma
Brahma (, ) is a Hindu god, referred to as "the Creator" within the Trimurti, the triple deity, trinity of Para Brahman, supreme divinity that includes Vishnu and Shiva.Jan Gonda (1969)The Hindu Trinity, Anthropos, Bd 63/64, H 1/2, pp. 212–226.Jan Gonda (1969)The Hindu Trinity, Anthropos, Bd 63/64, H 1/2, pp. 218–219. He is associated with creation, knowledge, and the ''Vedas''. Brahma is prominently mentioned in Creation myth, creation legends. In some ''Puranas'', he created himself in a golden embryo known as the Hiranyagarbha. Brahma is frequently identified with the Rigvedic deities, Vedic god Prajapati.;David Leeming (2005), The Oxford Companion to World Mythology, Oxford University Press, , page 54, Quote: "Especially in the Vedanta Hindu Philosophy, Brahman is the Absolute. In the Upanishads, Brahman becomes the eternal first cause, present everywhere and nowhere, always and never. Brahman can be incarnated in Brahma, in Vishnu, in Shiva. To put it another way, eve ...
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Routledge
Routledge ( ) is a British multinational corporation, multinational publisher. It was founded in 1836 by George Routledge, and specialises in providing academic books, academic journals, journals and online resources in the fields of the humanities, behavioral science, behavioural science, education, law, and social science. The company publishes approximately 1,800 journals and 5,000 new books each year and their backlist encompasses over 140,000 titles. Routledge is claimed to be the largest global academic publisher within humanities and social sciences. In 1998, Routledge became a subdivision and Imprint (trade name), imprint of its former rival, Taylor & Francis, Taylor & Francis Group (T&F), as a result of a £90-million acquisition deal from Cinven, a venture capital group which had purchased it two years previously for £25 million. Following the merger of Informa and T&F in 2004, Routledge became a publishing unit and major imprint within the Informa "academic publishing ...
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Mahākāśyapa
Mahākāśyapa () was one of The ten principal disciples, the principal disciples of Gautama Buddha. He is regarded in Buddhism as an arhat, enlightened disciple, being Śrāvaka#Foremost disciples, foremost in dhutanga, ascetic practice. Mahākāśyapa assumed leadership of the Sangha, monastic community following the ''Parinirvana, parinirvāṇa'' (death) of the Buddha, presiding over the First Buddhist council, First Buddhist Council. He was considered to be the first Zen lineage charts#The Indian Lineage From Shakyamuni to Bodhidharma, patriarch in a number of Early Buddhist schools and continued to have an important role as patriarch in the Chan Buddhism, Chan/Zen tradition. In Buddhist texts, he assumed many identities, that of a renunciant saint, a lawgiver, an anti-establishment figure, but also a "guarantor of future justice" in the time of Maitreya, the future Buddhahe has been described as "both the anchorite and the friend of mankind, even of the outcast". In canon ...
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Payasi
Pāyāsi or Paesi is a legendary king mentioned in the ancient Buddhist and Jain texts of India. In these legends, he appears as a materialist who orders several experiments to conclude that the soul does not exist. A Jain or Buddhist monk proves him wrong in a debate, and converts him to their faith. Legends According to Buddhist and Jain legends, Paesi ordered several cruel experiments to conclude that the soul does not exist. For example, he had a thief thrown alive in a brass pot, with a brass lid soldered over it, to see how his soul could escape after his death. Buddhist and Jain works mention similar accounts of other people conducting such experiments to deny the existence of soul. In all these accounts, a Buddhist or Jain monk defeats the person denying the existence of the soul in a debate. E.g. in Haribhadra's ''Samaraichcha Katha'' (''Samarditya Katha''), a man named Pingakesa states that a robber sentenced to death had been put in a sealed iron vessel, but no sou ...
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Gautama Buddha
Siddhartha Gautama, most commonly referred to as the Buddha (),* * * was a śramaṇa, wandering ascetic and religious teacher who lived in South Asia during the 6th or 5th century BCE and founded Buddhism. According to Buddhist legends, he was born in Lumbini, in what is now Nepal, to royal parents of the Shakya clan, but Great Renunciation, renounced his Householder (Buddhism), home life to live as a wandering ascetic. After leading a life of mendicancy, asceticism, and meditation, he attained Nirvana (Buddhism), nirvana at Bodh Gaya, Bodh Gayā in what is now India. The Buddha then wandered through the lower Indo-Gangetic Plain, teaching and building a Sangha, monastic order. Buddhist tradition holds he died in Kushinagar and reached ''parinirvana'' ("final release from conditioned existence"). According to Buddhist tradition, the Buddha taught a Middle Way between sensual indulgence and severe asceticism, leading to Vimutti, freedom from Avidyā (Buddhism), ignora ...
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