Towering sound and cutting-edge technologies—our picks for the best floorstanding speakers deliver immersive audio for every ...

Finding Congruences of Squares: The algorithm searches for numbers that, when squared, are congruent to the target number modulo a given base. This process identifies potential factors. Linear Algebra ...

Gerry Baker is Editor at Large of The Wall Street Journal. His weekly column for the editorial page, “Free Expression,” appears in The Wall Street Journal each Tuesday. Mr. Baker is also host ...