Search results
19 godz. temu · In differential geometry, a Riemannian manifold (or Riemannian space) (,), so called after the German mathematician Bernhard Riemann, is a real, smooth manifold equipped with a smoothly-varying family of positive-definite inner products on the tangent spaces at each point .. The family of inner products is called a Riemannian metric (or a Riemannian metric tensor, or just a metric).
19 godz. temu · t. e. In physics, the special theory of relativity, or special relativity for short, is a scientific theory of the relationship between space and time. In Albert Einstein 's 1905 treatment, the theory is presented as being based on just two postulates: [p 1] [1] [2] The laws of physics are invariant (identical) in all inertial frames of ...
19 godz. temu · 109 Gm (0.7 au) – Distance between Venus and the Sun; 110 Gm – Diameter of Rigel; 149.6 Gm (93.0 million mi; 1.0 au) – Average distance between the Earth and the Sun – the original definition of the astronomical unit; 180 Gm (1.2 au) – Maximum diameter of Sagittarius A*, the supermassive black hole in the center of Milky Way galaxy
19 godz. temu · Carthage [a] was an ancient city in Northern Africa, on the eastern side of the Lake of Tunis in what is now Tunisia. Carthage was one of the most important trading hubs of the Ancient Mediterranean and one of the most affluent cities of the classical world. It became the capital city of the civilisation of Ancient Carthage and later Roman ...
