<p>Let <i>P</i> be a nonzero projective module over an integral group ring. We consider the question of whether the rank of <i>P</i> is necessarily positive.</p>

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On the rank of projective modules

  • F.E.A. Johnson

摘要

Let P be a nonzero projective module over an integral group ring. We consider the question of whether the rank of P is necessarily positive.