The Timekeeper's Son

The Pleiades: the celestial herd of ancient timekeepers

In the ancient Egypt seven goddesses, represented by seven cows, composed the celestial herd that provides the nourishment to her worshippers. This herd is observed in the sky as a group of stars, the Pleiades, close to Aldebaran, the main star in the Taurus constellation. For many ancient populations, Pleiades were relevant stars and their rising was marked as a special time of the year. In th...

Cloud SON: A New Member of the SON Family

Le Laboratoire de Lague: Son role et son expansion

IRREDUCIBILITY OF COMMUTING VARIETY ASSOCIATED WITH (son+m, son⊕som)

The ground field k is algebraically closed and of characteristic zero. Let g be a reductive algebraic Lie algebra over k and σ an involutory automorphism of g. Then g = g0 ⊕ g1 is the direct sum of σ-eigenspaces. Here g0 is a reductive subalgebra and g1 is a g0-module. Let G be the adjoint group of g and G0 ⊂ G a connected subgroup with LieG0 = g0. The commuting variety of (g, g0) is the follow...

This Stranger, My Son

This is the story of how a conventional middle-class American household?a surgeon, his wife and three normal children?had first to recognise, then to cope with and, finally, to exclude, an abnormal family member. Tony was a beautiful child, the eldest, and apart from long hours of screaming for no apparent reason, he seemed a normal baby. His intellectual and motor development was average, but ...