"Who can think that this eviction of Germans was undertaken only as a temporary experiment? Those who adopted the decision on the eviction of the Germans from these territories, and who understood that Poles from other Polish districts would at once move into these territories, cannot suggest after a while to carry out reverse measures. The very idea of involving millions of people in such experiments is unbelievable, quite apart from the cruelty of it, both towards the Poles and the Germans themselves."

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I was appalled to find that the mathematical notation on which I had been raised failed to fill the needs of the courses I was assigned, and I began work on extensions to notation that might serve. In particular, I adopted the matrix algebra used in my thesis work, the systematic use of matrices and higher-dimensional arrays (almost) learned in a course in Tensor Analysis rashly taken in my third year at Queen's, and (eventually) the notion of Operators in the sense introduced by Heaviside in his treatment of Maxwell's equations.

— Kenneth E. Iverson