Methods in Sequences and Summations Article Added

I have finally finished Methods in Sequences and Summations—and it took much longer than I had hoped!

It proved trickier to write than I initially expected. The article covers a loosely connected collection of techniques, so organising them and distilling the essential ideas—without disappearing into less relevant mathematical details—was surprisingly difficult.

I consider this topic highly relevant to the TMUA—even more relevant than my own favourite subject, modulo arithmetic—so I strongly recommend having a look!