We study 4d SCFTs obtained by orientifold projections on necklace quivers with fractional branes. The models this procedure are $\mathcal{N}=1$ linear unitary, symplectic and orthogonal gauge groups, bifundamental tensorial matter. Remarkably, that not dual in the unoriented case can have same central charges superconformal index after projection. reason for behavior rests upon ubiquitous prese...

A bstract We investigate a holographic realization in Type-IIB string theory of pure Chern-Simons theories, and focus on the level/rank dualities that they enjoy. The duality is established between boundary theory, engineered utilizing D3-branes compactified S 1 , probe D7-branes located at specific bulk location. Paying attention to conditions imposed Ramond-Ramond (RR) two- six-forms, we show...