James Young Simpson was one of the first obstetricians to administer anesthesia during childbirth in nineteenth century Scotland. Before his work in the 1800s, physicians had few ways to reduce the pain of childbirth. Simpson experimented with the use of ether and chloroform, both gaseous chemicals, to temporarily relieve pain. He found that those chemicals both successfully inhibited the pain ...

For any projective curve X let M d (X) be the Simpson moduli space of pure dimension one rank 1 degree d sheaves that are semistable with respect to a fixed polarization H on X . When X is a reduced curve the connected component of M d (X) that contains semistable line bundles can be considered as the compactified Jacobian of X . In this paper we give explicitly the structure of this compactifi...

The Deligne-Simpson problem asks to find a condition on conjugacy classes C1, . . . , Ck ⊂ Matn(C) such that there are matrices Yi ∈ Ci with (1) ∑k i=1 Yi = 0, (2) and there are no proper subspaces in C stable under all Yi. Crawley-Boevey reduced this problem to checking if there is an irreducible representation in Rep(Π(Q), v) for suitable Q, λ, v produced from C1, . . . , Ck. Recall, Section ...

Only three of the essays are taken from Aequanimitas, which is still readily available. The value of the collection is greatly enhanced by the commentaries of the fourteen distinguished American medical specialists and librarians, which puts each essay critically in perspective. In the sum of its parts, it is a book which may be read and enjoyed by those who are interested in medical education ...

G. G. Simpson was the first to explain the Baldwin Effect completely in terms of the theory of natural selection. A genetic version of a seemingly non-hereditary adaptation may arise when natural selection acts on the likelihood of having an adaptive trait not just on the trait itself. We present a quantitative model of the Simpson-Baldwin Effect. Organisms in the model have mutable ranges of p...