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

Prefix 

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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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