Problem 13.6

A First Course in String Theory

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13.6 Orientifold Op-planes

(a) For an O23-plane the two normal directions \displaystyle{x^{24}, x^{25}} can be represented by a plane. A closed string at a fixed \tau appears as a parameterized closed curve \displaystyle{X^a(\tau, \sigma)} in this plane. Draw such an oriented closed string that lies fully in the first quadrant of the \displaystyle{(x^{24}, x^{25})} plane. Draw also the string \displaystyle{\tilde{X}^a(\tau, \sigma) = -X^a(\tau, 2\pi - \sigma)}.

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d_2019_08_26__22_32_32_PM_a

This one is wrong.

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d_2019_08_26__22_31_55_PM_b

— Me@2019-08-26 10:31:07 PM

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2019.08.26 Monday (c) All rights reserved by ACHK