Get Started Learning General Relativity Online

…relativity, all of which is available for free online. If you know of any online resources that are not on this list, suggest them in the comments and I will add them to the list! Contents Non-mathematical introductions to general relativity Mathematical introductions to general relativity Philosophy of general relativity Other general relativity references. Non-mathematical introductions to general relativity Einstein for Everyone, by John D. No…

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Special: What’s With the Economy.

…o make and sell burgers in. The wealthy Scrooge McDuck had enough money to buy buildings. So they struck the following deal. McDuck gave BurgerBee the money to buy a building for their burger joint (say, 100,000 dollars). In return, BurgerBee gave McDuck a little certificate, which says that BurgerBee will pay McDuck MUCH MORE than the original amount (say, 200,000 dollars). But the payments are made in small amounts, every month, over the course…

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Get Started Reading Books and Articles on the Cheap

…. Or, visit your local University’s library for an even grander selection. Buy very, very cheap books. Ok, so this one’s almost free. There are hundreds of books selling at less than 1 cent on Amazon. They’re not all worth a penny, but there are some real jewels among the noise, which you can get for only the price of shipping. To find them, try browsing by subject, and then selecting “Sort by Price: Low to High.” Reading With Questionable Scruple…

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Curie’s Principle: Not a theorem, Not even for Ismael

…cal formulation: begin with a set (a set of “causes”) and a set (a set of “effects”). Assume that every cause has no more than one effect, by asserting that the causes and effects are related by a function . Ismael views this (possibly many-to-one) function equivalently as a subset such that, if and are both in , then . Finally, let a “symmetry transformation” be a pair of bijections: one on , and the other on . These are formally different functi…

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Can Time Unfold in the Wrong Direction?

…f spatial regions. However, William and the astronaut will agree about the order in which time-like separated events occur: first Harold is crowned, and then Harold is slain. Figure 1: An observer on Earth and an astronaut traveling away with velocity c/2 will describe two different foliations of spacetime into space-like hypersurfaces of simultaneity. On the other hand, an accelerating observer will not generally agree about the order in which th…

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