• Media type: E-Article
  • Title: Minimality in the ▵<sup>1</sup><sub>3</sub>-Degrees
  • Contributor: Welch, Philip
  • imprint: Association for Symbolic Logic, Inc., 1987
  • Published in: The Journal of Symbolic Logic
  • Language: English
  • ISSN: 0022-4812
  • Origination:
  • Footnote:
  • Description: <p>We show in ZFC, assuming all reals have sharps, that a countable collection of ▵&lt;sup&gt;1&lt;/sup&gt;&lt;sub&gt;3&lt;/sub&gt;-degrees without a minimal upper bound implies the existence of inner models with measurable cardinals.</p>