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1. • CommentRowNumber1.
   • CommentAuthorUrs
   • CommentTimeAug 25th 2019
   • PermaLink
   Author: Urs
   Format: MarkdownItexfor completeness in view of the other real normed division algebras, I added statement of the automorphism group <a href="https://ncatlab.org/nlab/revision/diff/complex+number/25">diff</a>, <a href="https://ncatlab.org/nlab/revision/complex+number/25">v25</a>, <a href="https://ncatlab.org/nlab/show/complex+number">current</a>

   for completeness in view of the other real normed division algebras, I added statement of the automorphism group

   diff, v25, current

2. • CommentRowNumber2.
   • CommentAuthorTodd_Trimble
   • CommentTimeAug 26th 2019
   • PermaLink
   Author: Todd_Trimble
   Format: MarkdownItexAdded further remarks on the number of automorphisms. <a href="https://ncatlab.org/nlab/revision/diff/complex+number/26">diff</a>, <a href="https://ncatlab.org/nlab/revision/complex+number/26">v26</a>, <a href="https://ncatlab.org/nlab/show/complex+number">current</a>

   Added further remarks on the number of automorphisms.

   diff, v26, current

3. • CommentRowNumber3.
   • CommentAuthorDavidRoberts
   • CommentTimeAug 26th 2019
   • PermaLink
   Author: DavidRoberts
   Format: MarkdownItex2-dimensional normed division algebra **over $\mathbb{R}$**. <a href="https://ncatlab.org/nlab/revision/diff/complex+number/27">diff</a>, <a href="https://ncatlab.org/nlab/revision/complex+number/27">v27</a>, <a href="https://ncatlab.org/nlab/show/complex+number">current</a>

   2-dimensional normed division algebra over $\mathbb{R}$.

   diff, v27, current

4. • CommentRowNumber4.
   • CommentAuthorUrs
   • CommentTimeApr 22nd 2023
   • PermaLink
   Author: Urs
   Format: MarkdownItexadded these further pointers on the history of the notion of complex numbers: * [[Jean-Pierre Tignol]], p. 19 of: *Galois' Theory of Algebraic Equations*, World Scientific (2001) &lbrack;[doi:10.1142/4628](https://doi.org/10.1142/4628)&rbrack; * Orlando Merino, *A Short History of Complex Numbers* (2006) &lbrack;[pdf](https://www.math.uri.edu/~merino/spring06/mth562/ShortHistoryComplexNumbers2006.pdf), [[Merino-ComplexNumbers.pdf:file]]&rbrack; <a href="https://ncatlab.org/nlab/revision/diff/complex+number/33">diff</a>, <a href="https://ncatlab.org/nlab/revision/complex+number/33">v33</a>, <a href="https://ncatlab.org/nlab/show/complex+number">current</a>

   added these further pointers on the history of the notion of complex numbers:

   • Jean-Pierre Tignol, p. 19 of: Galois’ Theory of Algebraic Equations, World Scientific (2001) [doi:10.1142/4628]

   • Orlando Merino, A Short History of Complex Numbers (2006) [pdf, Merino-ComplexNumbers.pdf:file]

   diff, v33, current