Accurate measurement of time-varying systematic risk exposures is essential for robust financial risk management.

Essentially all cells in an organism's body have the same genetic blueprint, or genome, but the set of genes that are ...

Proceedings of the Royal Society of London. Series A, Mathematical and Physical Sciences, Vol. 305, No. 1480 (May 21, 1968), pp. 1-25 (25 pages) Variational principles for problems in fluid dynamics, ...