What exactly this means is a big question, which is never fully answered. He calls it the Mathematical Universe Hypothesis (M.U.H.). Math is so effective in describing the world, he says, because physical reality is a mathematical structure. Yet Tegmark’s take is quite different from - and in some ways inconsistent with - Platonism. Packed with clever metaphors, this section illuminates an important area on the cutting edge of modern physics. But if so, how could mass be created from nothing: “Who paid for the ultimate free lunch?” Tegmark does an excellent job explaining this and other puzzles in a way accessible to nonspecialists. The “radical insight” was that if once upon a time there was “a tiny uniform blob of a substance whose density was very hard to dilute,” then it could “inflate,” exponentially increasing its size. An important step toward unraveling the mystery was the theory of inflation initiated in the 1980s by Alan Guth and others.
However, the Big Bang and the expansion of the universe still elude our understanding. He tells us of cosmic microwave radiation, “the faint afterglow” of the Big Bang, and other discoveries in cosmology in the past 50 years that yielded “baby pictures of when our universe was ‘only’ 400,000 years old” and “crucial clues to our cosmic origins.” Tegmark participated in some of these pioneering developments, and he enlivens his story with personal anecdotes. The first part starts with a list of fundamental questions, such as: Is space infinite? Is the Milky Way expanding? What caused the Big Bang? What are dark matter and dark energy? After lucidly educating us about stars and galaxies, Dr. Tegmark, is a discussion of his controversial idea that reality itself is a mathematical structure. Tegmark, is an informative survey of exciting recent developments in astrophysics and quantum theory. This strategy is employed in the book itself, which can be divided into two parts, different as day and night. Hyde” and indulge in writing “wacky” papers on “the ultimate nature of reality.”
Hyde Strategy”: During the day he would do respectable work on mainstream topics in cosmology, but at night he would “transform into the evil Mr. Halfway into his new book, “Our Mathematical Universe,” the M.I.T.
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