2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/149364We study compactifications of the $N=2$ 6D tensionless string on various complex two-folds down to two-dimensions. In the IR limit they become non-trivial conformal field theories in 2D. Using results of Vafa and Witten on the partition functions of twisted Super-Yang-Mills theories, we can study the resulting CFT. We also discuss the contribution of instantons made by wrapping strings on 2-cycles of the complex two-fold.22pp LaTeX, refs. and minor changes addedHigh Energy Physics - Theorytext