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This is an audio version of the Wikipedia Article:
https://en.wikipedia.org/wiki/Type_II_string_theory


00:00:29 1 Type IIA string theory
00:01:16 2 Type IIB string theory
00:02:15 3 Relationship between the type II theories
00:02:24 4 See also
00:02:35 5 References
00:02:46 See also



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SUMMARY
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In theoretical physics, type II string theory is a unified term that includes both type IIA strings and type IIB strings theories. Type II string theory accounts for two of the five consistent superstring theories in ten dimensions. Both theories have the maximal amount of supersymmetry — namely 32 supercharges — in ten dimensions. Both theories are based on oriented closed strings. On the worldsheet, they differ only in the choice of GSO projection.