Magma

MAGMA Computational Algebra System

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COPRODUCTS

 
Acknowledgements
 
Introduction
 
Creation Functions
      Creation of Coproducts
      Creation of Coproduct Elements
 
Accessing Functions
 
Retrieve
 
Flattening
 
Universal Map







DETAILS

 
Introduction

 
Creation Functions

      Creation of Coproducts
            cop< S1, S2, ..., Sk > : Str, Str, ... -> Cop, [ Map ]

      Creation of Coproduct Elements
            m(e) : Map, Elt -> CopElt
            C ! e : Cop, Elt -> CopElt

 
Accessing Functions
      Injections(C) : Cop -> [ Map ]
      # C : Cop -> RngIntElt
      Constituent(C, i) : Cop, RngIntElt -> Str
      Index(x) : CopElt -> RngIntElt

 
Retrieve
      Retrieve(x) : CopElt -> Elt
      Example Cop_cop (H14E1)

 
Flattening
      Flat(C) : Cop -> Cop

 
Universal Map
      UniversalMap(C, S, [ n1, ..., nm ]) : Cop, Str, [ Map ] -> Map

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