Inner

• Example: Inner[f,a,b,x,y,g].

• Inner[f,a,b,c,d,x,y,g].

• Like Dot, Inner effectively contracts the last index of the first tensor with the first index of the second tensor. Applying Inner to a rank tensor and a rank tensor gives a rank tensor.

• Inner[f, , ] uses Plus for g.

• Inner[f, , , g, n] contracts index n of the first tensor with the first index of the second tensor.

• The heads of and must be the same, but need not necessarily be List.

• See Section 2.2.10 and Section 3.7.11.

• See also: Outer, Thread, MapThread, ListCorrelate.

• New in Version 1.

• Advanced Documentation.