<p>We study automorphisms of the incidence algebra <i>I</i>(<i>X</i>,&#xa0;<i>R</i>), where <i>X</i> is a&#xa0;preordered set and <i>R</i> is an algebra over some commutative ring&#xa0;<i>T</i>. Under some fairly general assumptions, it is established that every automorphism of such an algebra is a&#xa0;product of four automorphisms, the structure of which can be considered known.</p>

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AUTOMORPHISMS OF INCIDENCE ALGEBRAS

  • P. A. Krylov,
  • A. A. Tuganbaev

摘要

We study automorphisms of the incidence algebra I(XR), where X is a preordered set and R is an algebra over some commutative ring T. Under some fairly general assumptions, it is established that every automorphism of such an algebra is a product of four automorphisms, the structure of which can be considered known.