A First Course in String Theory

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Consider a two-dimensional world with coordinates and .

A boost with velocity parameter along the axis is described by the first two equations in (2.36). We want to understand the two-dimensional space that emerges if we identify

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We are identifying spacetime points whose coordinates are related by a boost!

(a) Use the result of Problem 2.2, part (a), to recast (1) as

, where .

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— Me@2021-05-04 10:48:28 PM

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2021.05.05 Wednesday (c) All rights reserved by ACHK