Mathematics – Logic
Scientific paper
2010-09-08
Archive for Mathematical Logic, Volume 50 (2011), Numbers 5-6, 543-564
Mathematics
Logic
18 pages. New proof of the maximal chain theorem in ATR_0
Scientific paper
10.1007/s00153-011-0231-1
We show that the maximal linear extension theorem for well partial orders is
equivalent over RCA_0 to ATR_0. Analogously, the maximal chain theorem for well
partial orders is equivalent to ATR_0 over RCA_0.
Marcone Alberto
Shore Richard A.
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