Outer product of vectors:

Outer product of matrices:

Treat nested lists as rank-1 vectors of sublists:

Arrays can be ragged:

Outer product of SparseArray objects:

The head need not be List:

Word combinations:

Function combinations:

Complete bipartite graph:

Lower-triangular matrix:

Generate all possible binary trees with nodes from f and leaves from e to depth n:

Apply a function on a tensor product grid:

Show a contour plot of the values and the grid:

Include coordinates:

Make a piecewise polynomial that interpolates the data:

The dimensions of the result are a concatenation of the dimensions of the inputs:

Outer[f] returns f[]:

Distribute forms the same combinations of all elements, but in a flat structure:

KroneckerProduct is a flattened outer product of matrices:

Part effectively uses an outer product when given lists of parts at multiple levels:

Table can also make a generalized outer product from lists:

If backgrounds are inconsistent, a generalized outer product may not be sparse:

You can convert it into a SparseArray by choosing a background: