David Ignatius writes a twice-a-week foreign affairs column for The Washington Post. His latest novel is “Phantom Orbit.” ...

Commentary from Charles Blow, Jamelle Bouie, David Brooks, Frank Bruni, Gail Collins, Ross Douthat, Maureen Dowd, Thomas Friedman, Michelle Goldberg, Nicholas Kristof, Paul Krugman, Jennifer ...

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Ann Coulter is the author of seven New York Times bestsellers -- Guilty: Liberal Victim and Their Assault On America (January 2009); If Democrats Has Any Brains,They'd Be Republicans (October 2007 ...

A daily crossword column that provides hints and tips for the New York Times crossword.

Uplink-downlink duality refers to the fact that under a sum-power constraint, the capacity regions of a Gaussian multiple-access channel and a Gaussian broadcast channel with Hermitian transposed ...