Celebratio Mathematica

I took a lin­ear al­gebra course from Pro­fess­or Al­bert in 1956, which I re­call was not too hard. But what sticks in my memory most is that he was am­bi­dex­trous and would write fast with one hand while lec­tur­ing, and then in mid-sen­tence would switch to the oth­er hand. The black­board had an un­usu­al look, with parts slanted one way, and oth­er parts the oth­er way. And we stu­dents breath­lessly tried to keep up with our notes, han­di­capped by just one hand!