Abstract
We use the AdS/CFT correspondence to compute the central charges
of the d = 4, 
= 2 superconformal field theories arising from
N D3-branes at singularities in F-theory. These include the conformal theories
with En global symmetries. We compute the central charges a and c
related to the conformal anomaly, and also the central charges k associated to the
global symmetry in these theories. All of these are related to the coefficients
of Chern-Simons terms in the dual string theory on AdS5. Our computation is
exact for all values of N, enabling several tests of the dualities recently
proposed by Argyres and Seiberg for the E6 and E7 theories with N = 1.
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