dist -- produces a DiffAlgDistribution from a list

Synopsis

• Usage:

  dist(L)

• Inputs:
  • L, a list, list of vector fields, see DiffAlgField
• Outputs:
  • an instance of the type DiffAlgDistribution, generated by the vector fields in the given list.

Description

This command checks that all the elements in the list are vector fields.

i1 : X = newField("3*x_0*ax_0+x_1*ax_1")

o1 = 3x ax  + x ax
       0  0    1  1

o1 : DiffAlgField

i2 : Y = radial 3

o2 = x ax  + x ax  + x ax  + x ax
      0  0    1  1    2  2    3  3

o2 : DiffAlgField

i3 : dist {X,Y}

o3 = {3x ax  + x ax , x ax  + x ax  + x ax  + x ax }
        0  0    1  1   0  0    1  1    2  2    3  3

o3 : DiffAlgDistribution

See also

• newField -- constructor of a vector field
• radial -- defines the radial vector field
• rank(DiffAlgDistribution) -- rank of the given distribution
• isInvolutive -- tests if a distribution is involutive