(to the tune of *Old MacDonald*)

Ol' Don Goldberg had a field, *e*^{iπ}+1

In that field there was a ring, *e*^{iπ}+1

With a product here, and a prime divisor there

*p* is prime, UFD, *p* divides *a* or *b*

Ol' Don Goldberg had a field, *e*^{iπ}+1

Ol' Gon Doldberg had some stamps, *e*^{iπ}+1

Their GCD was seventeen, *e*^{iπ}+1

With an *Ax* here and a *By* there

*Ax*, *By*, mail a letter anywhere

Ol' Gon Doldberg had some stamps, *e*^{iπ}+1

Ol' Gol Donberg had a group, *e*^{iπ}+1

The group had order *phi* of *n*, *e*^{iπ}+1

With a subgroup here and a generator there

Here a theorem, there a theorem, even Fermat's Little Theorem

Ol' Gol Donberg had a group, *e*^{iπ}+1

Ol' Berg Goldon had a map, *e*^{iπ}+1

And on the map there were countries, *e*^{iπ}+1

With a color here, and a color there

Takes four colors everywhere

Ol' Berg Goldon had a map, *e*^{iπ}+1

Ol' Derg BonBon had a plane, *e*^{iπ}+1

And on the plane there was a line, *e*^{iπ}+1

Off that line there was a point, *e*^{iπ}+1

Through that point a parallel, and there was but one!