Joseph Lipman, Notes and Exercises on Constructibility, Theorem 2 and corollary¶
Joseph Lipman, *Notes and Exercises on Constructibility*, Theorem 2 and corollary. Notes and Exercises on Constructibility.
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Domain-specific¶
- Quadratically Closed Field
- The word complex matters: the field of real constructible numbers lacks a square root of −1 and is not quadratically closed.
This sourceOriginal Purdue notes identify complex constructible points with finite quadratic towers over a conjugation-closed base and give the power-of-two degree obstruction.
- The word complex matters: the field of real constructible numbers lacks a square root of −1 and is not quadratically closed.
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Registry ID ref:e0f058fbf37f · see in the full table