A Rose is a...

I made rose flavored ice cream the other night - fresh, cool, perfectly smooth, fragrant, nostalgic, just lovely.

Whatever happened to Lilly Hahn?

I've recently been poring over 'The Crisis in Intuition' - a paper by Hans Hahn, founding member of the Vienna circle and early 20th century mathematician. At one point, he is passionately describing the removal of intuition from mathematics and says, 'The simple geometric proposition that "every closed polygon that does not cross itself divides the plane into two separate parts" requires a lengthy and highly complicated proof. This is true to an even greater degree of the analogous proposition of solid geometry: "every closed polyhedron that does not intersect itself divides space into two separate parts.'

The latter proof is referenced, and upon checking the end notes, I found that it was published by one 'Lilly Hahn'.

Lilly, thought I, a woman? Sister to Hans? Getting excited I googled 'Lilly Hahn', and found one relevant hit, in the wikipedia article on Hans: 'He married in 1909 Eleonore ("Lilly") Hahn, and they had a baby, Nora'. That was all. So she was his wife, but... but...where did she come from? Where did she train? What else did she prove? So far, I can't find anything about her - no articles on Google scholar, no other mention of her work. How perfectly infuriating. This is not the only one. The history of mathematics (and science) is littered with such desaparecidas.