One way to get many variables suitable for use as indeterminates in
a polynomial ring is with the function vars. It converts
a list or sequence of integers into symbols. It prefers to hand out
symbols whose name consists of a single letter, but there are only 52
such symbols, so it also uses symbols such as x55
and X44.
i1 : vars (0 .. 9,40,100,-100)
o1 = (a, b, c, d, e, f, g, h, i, j, O, x48, X100)
o1 : Sequence
These variables can be used to make polynomial rings.
