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What Kind of Number Is \( \sqrt 2 ^{\sqrt 2 } \)?

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My Numbers, My Friends
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I am grateful P. Bundschuh and M. Waldschmidt for advice during the preparation of this text

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(2000). What Kind of Number Is \( \sqrt 2 ^{\sqrt 2 } \)?. In: My Numbers, My Friends. Springer, New York, NY. https://doi.org/10.1007/0-387-22754-7_10

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