Abstract
Summary: We present upper estimates of dimensions of sums of graphs in terms of the number of summands and the maximum of their dimensions. The result is an improvement of the estimates contained in a paper by S. Poljak and V. Rödl Czech. Math. J. 30, 475-485 (1980; Zbl 0456.05051). The paper has been finally published under the title ``The dimension of sums of graphs
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