When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. CHATSWORTH, CALIF.—Gefen's 4x4 Matrix for HDMI 4Kx2K routes four sources to any combination of ...

Mathematicians love a good puzzle. Even something as abstract as multiplying matrices (two-dimensional tables of numbers) can feel like a game when you try to find the most efficient way to do it.

Computer scientists are a demanding bunch. For them, it’s not enough to get the right answer to a problem — the goal, almost always, is to get the answer as efficiently as possible. Take the act of ...