In the present context the "pseudovector" is one of these combinations. This term is attached to a different multivector depending upon the dimensions of the space (that is, the number of linearly independent vectors in the space). In three dimensions, the most general 2-blade or bivector can be expressed as the wedge product of two vectors and is a pseudovector. In four dimensions, however, the pseudovectors are trivectors. In general, it is a -blade, where "n" is the dimension of the space and algebra. An "n"-dimensional space has "n" basis vectors and also "n" basis pseudovectors. Each basis pseudovector is formed from the outer (wedge) product of all but one of the "n" basis vectors. For instance, in four dimensions where the basis vectors are taken to be {e1, e2, e3, e4}, the pseudovectors can be written as: {e234, e134, e124, e123}.