This is a sort of strange question that popped into my head when I was reading a paper. In writing mathematics, many authors use the phrase "as desired" to conclude a proof, usually written to indicate that one has reached the result originally stated. I know that this is perfectly good English, but the phrase is so widespread, despite the fact that there are many other similar alternatives. Does anybody know whether the phrase has any specific origins?
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From Wikipedia http://en.wikipedia.org/wiki/Q.E.D.:
But I don't know how close this translation of Q.E.D. "what was required" is to the phrase "as desired", as desired by the OP.