2.3 Extensions

The general expression of aa indexed notation is given by the following notation as seen before:

⊙
    Ei
 i∈I

This is really the most general notation, no further concepts are needed to write more complex index notations. This will be shown now by studying several “extensions”, which all can be reduced to this simple form.

   2.3.1 A list of (indexed) expressions
   2.3.2 Index Sets as Expressions
   2.3.3 Compound Index Notation