Output on right is from latex for comparison. In KaTeX, the -6 \pi and -8 \pi exponents collide with the fraction bars above them. I'm on OS 10.9.4 and I see this issue in both Chrome and Firefox.

Abstract: We study the problem of universal decoding for unknown discrete memoryless channels in the presence of erasure/list option at the decoder, in the random coding regime. In particular, we ...