jo'i _{JOhI

…TEhU} cmavo

join mathematical expression (mex) operands into an array.

In notes:

nacmeimei: x₁ is an x₂ by x₃ vector array/matrix of vectors x₄, x₅, x₆...
sorkubli: x₁ is a mucube
ja'oi: permutation cycle writer notation start
se'u'o: selbri conversion question