We prove that H2(SL3(Z[t]);Q)H2(SL3(Z[t]);Q) is infinite dimensional. The proof follows an outline similar to recent results by Cobb, Kelly, and Wortman, using the Euclidean building for SL3(Q((t−1)))SL3(Q((t−1))) and a Morse function from Bux-K"ohl-Witzel.
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