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The period of extended low oxygen, which spanned from roughly 2 to less than 1 billion years ago, was a time of remarkable chemical stability in the Earth's oceans and atmosphere. A University of Cali...
Lagrangian blow-ups, blow-downs, and applications to real packing
Lagrangian blow-ups blow-downs applications real packing
2011/1/18
Given a symplectic manifold (M; !) and a Lagrangian submanifold L, we construct versions of the symplectic blow-up and blow-down which are defined relative to L.
The Ups and Downs of the Great Chain of Being：the Case of Canine Zoosemy in the History of English
English Cognitive semanticists semantic change
2009/5/18
Cognitive semanticists argue that since language is systematically grounded in human
cognition, the phenomenon of semantic change is to be viewed as a cognitively
motivated process explicable in ter...
In recent years, legislative changes, new types of retirement plans, and increases in life expectancy have led to differences in retirement ages; workers now have many alternatives to traditional reti...