DiffAlgElement | String -- concatenate a string with a differential form or vector field

Synopsis

Usage:
e | text
Operator: |
Inputs:
- e, an object of class DiffAlgElement, a differential form or a vector field
- text, a string, a string to be concatenated
Outputs:
- a string, concatenation of text with the string representation of e

Description

i1 : w=newForm(2,1,2,"a")

         2               2                          2           2           
o1 = (a x  + a x x  + a x  + a x x  + a  x x  + a  x )dx  + (a x  + a x x  +
       0 0    3 0 1    9 1    6 0 2    12 1 2    15 2   0     1 0    4 0 1  
     ------------------------------------------------------------------------
         2                          2           2                2           
     a  x  + a x x  + a  x x  + a  x )dx  + (a x  + a x x  + a  x  + a x x  +
      10 1    7 0 2    13 1 2    16 2   1     2 0    5 0 1    11 1    8 0 2  
     ------------------------------------------------------------------------
                   2
     a  x x  + a  x )dx
      14 1 2    17 2   2

o1 : DiffAlgForm

i2 : newForm ("b*4-"|w|"+4*dx_3")

           2               2                          2             2  
o2 = (- a x  - a x x  - a x  - a x x  - a  x x  - a  x )dx  + (- a x  -
         0 0    3 0 1    9 1    6 0 2    12 1 2    15 2   0       1 0  
     ------------------------------------------------------------------------
                  2                          2             2                2
     a x x  - a  x  - a x x  - a  x x  - a  x )dx  + (- a x  - a x x  - a  x 
      4 0 1    10 1    7 0 2    13 1 2    16 2   1       2 0    5 0 1    11 1
     ------------------------------------------------------------------------
                              2
     - a x x  - a  x x  - a  x )dx  + 4dx  + 4b
        8 0 2    14 1 2    17 2   2      3

o2 : DiffAlgForm