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The article presents a summary of a paper on the divergence of multiple Fourier-Haar series presented by speaker Giorgi Oniani at the Thirty-First Summer Symposium in Real Analysis held at the University of Oxford, England from August 13 to 15, 2007. The widest integral class in which the convergence of the rectangular partial sums of multiple of such series is guaranteed is cited. It notes that for every n ≥ 2, the divergence effects can be attained on a set of full measure in any class wider than L(ln+ L)n-1(In).