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Reference.org
Teleparallelism
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<p>Teleparallelism (also called teleparallel gravity), was an attempt by <a href="/facts/Albert_Einstein/CNTet8qu">Albert Einstein</a> to base a unified theory of <a href="/facts/Electromagnetism/oAkmALHT">electromagnetism</a> and <a href="/facts/Gravity/bqAN7DdQ">gravity</a> on the mathematical structure of distant parallelism, also referred to as absolute or teleparallelism. In this theory, a <a href="/facts/Spacetime/uRIN1x4b">spacetime</a> is characterized by a curvature-free <a href="/facts/Connection_(vector_bundle)/Rxv5S2Af">linear connection</a> in conjunction with a <a href="/facts/Metric_tensor/tbqek1gJ">metric tensor</a> field, both defined in terms of a dynamical <a href="/facts/Cartan_connection_applications/jyEhSaHM">tetrad</a> field. </p>