Some transfinite natural sums

Lipparini, P

Lipparini, P (reprint author), Univ Roma Tor Vergata, Dipartimento Matemat, Viale Ric Sci, I-00133 Rome, Italy.

MATHEMATICAL LOGIC QUARTERLY, 2018; 64 (6): 514

Abstract

We study a transfinite iteration of the ordinal Hessenberg natural sum obtained by taking suprema at limit stages. We show that such an iterated natur......

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