Zariski's proof ((Oscar Zariski.

*A new proof of Hilbert's Nullstellensatz*, Bulletin of the Ameican Mathematical Society Volume 53, Number 4 (1947), 362-368.)) of the Hilbert Nullstellensatz makes use of the ineffable*Rabinowitch*Trick ((J. L. Rabinowitsch,*Zum Hilbertschen Nullstellensatz*, Mathematische Annalen Volume 102, No. 1 (1929), 520.)) (check it out, that has got to be the shortest paper ever). But who*is*that awesome guy Rabinowitsch? I found out today, and the answer is basically in in this MO post: > Rainich was giving a lecture in which he made use of a clever trick which he had discovered. Someone in the audience indignantly interrupted him pointing out that this was the famous*Rabinowitsch*trick and berating Rainich for claiming to have discovered it. Without a word Rainich turned to the blackboard, picked up the chalk, and wrote**RABINOWITSCH**. He then put down the chalk, picked up an eraser and began erasing letters. When he was done what remained was**RABINOWITSCH**. He then went on with his lecture. Apparently, George Yuri Rainich is the mysterious stranger that went by the name of Rabinowitsch, which was his birthname ((Bruce P. Palka,*Editor's Endnotes (May 2004)*, The American Mathematical Monthly 111 (5): 456–460)) ((Bruce P. Palka,*Editor's Endnotes (December 2004)*. The American Mathematical Monthly 111 (10): 927–929)). I even updated the wikipedia page. Oh right, the reason this even caught my attention: Daniel R. Grayson has a really sweet, short proof of the Nullstellensatz, also using the Rainich Trick.