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Symmetric Function

Usage

Symmetric[{s1, ..., sn}] represents the symmetry of a tensor that is symmetric in the slots si.

Basic examples

This array is symmetric:
In[1]:=TensorSymmetry[{{{2, 9}, {9, 2}}, {{9, 2}, {2, 4}}}]
Out[1]=Symmetric[{1, 2, 3}]
Declare a rank-4 array to be symmetric in three slots:
In[1]:=$Assumptions=A element Arrays[{4, 4, 4, 4}, Reals, Symmetric[{1, 2, 4}]];
Then any transposition involving those slots is equivalent to the original tensor:
In[2]:=TensorTranspose[A, Cycles[{{2, 4}}]]//TensorReduce
Out[2]=A

Attribute

Protected

Relationships with other entities

SymmetricMatrixQ | Antisymmetric | TensorSymmetry | TensorTranspose | Arrays | Matrices | SymmetricGroup

Relationships with other entities

Typical ranks of usage in programs

2087th most common (1 in 583000 symbols)

918th most common (1 in 17100 symbols)

History

introduced in Version 9 (November 2012)

Timeline

Timeline

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