A. Ruinskii, “An Orthocenter of a Triangle and Cubic Curves”, Math. Ed., 2000, Issue 2(13),Pages <nobr>2

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Math. Ed., 2000 Issue 2(13), Pages 2–21 (Mi mo258)

Students and teachers of secondary school

An Orthocenter of a Triangle and Cubic Curves

A. Ruinskii