Veblen function: Difference between revisions

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Undid revision 1104830588 by C7XWiki (talk) this restriction is necessary for uniqueness of the normal form. Also Gamma_0 = phi_(Gamma_0) (0) > 0, so there is no problem with Gamma_0.
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==References==
{{Reflist}}
* Hilbert Levitz, ''[http://www.cs.fsu.edu/~levitz/ords.ps Transfinite Ordinals and Their Notations: For The Uninitiated]'', expository article (8 pages, in [[PostScript]])
*{{citation|last= Pohlers|first= Wolfram|title= Proof theory|mr= 1026933|series= Lecture Notes in Mathematics|volume= 1407|publisher= Springer-Verlag|place= Berlin|year= 1989|isbn= 978-3-540-51842-6|doi= 10.1007/978-3-540-46825-7|url-access= registration|url= https://archive.org/details/prooftheoryintro0000pohl}}