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Fourth Lecture

  • Dietrich Stauffer
  • Friedrich W. Hehl
  • Nobuyasu Ito
  • Volker Winkelmann
  • John G. Zabolitzky

Abstract

We will now continue with prefix operators provided by Reduce. Some of these operators, after evaluation, return more than one value. Those values are put into a list, which is a set of elements enclosed by two curly brackets1. The elements may be expressions or again lists:
$$ \{ el1,el2,el3,el4\} $$
$$ \{ a*(b + c)**4,\{ nothing\}, \{ y,n,g,q\} \} $$
Some operators even take lists as arguments. Hence it is necessary to have operators at one’s disposal which extract single expressions out of a list or which can combine lists and the like.

Keywords

Error Message Reduce Manual Single Expression Operator Delta Rule List 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag Berlin Heidelberg 1993

Authors and Affiliations

  • Dietrich Stauffer
    • 1
  • Friedrich W. Hehl
    • 1
  • Nobuyasu Ito
    • 2
  • Volker Winkelmann
    • 3
  • John G. Zabolitzky
    • 4
  1. 1.Institut für Theoretische PhysikUniversität zu KölnKölnGermany
  2. 2.Computing and Information Systems CenterJapan Atomic Energy Research InstituteTokai, IbarakiJapan
  3. 3.Regionales RechenzentrumUniversität zu KölnKölnGermany
  4. 4.Botec EngineeringOttobrunnGermany

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