Discussion about math, puzzles, games and fun. Useful symbols: ÷ × ½ √ ∞ ≠ ≤ ≥ ≈ ⇒ ± ∈ Δ θ ∴ ∑ ∫ • π ƒ ¹ ² ³ °
 

You are not logged in. #1 20060411 03:52:25
A linear algebra problemA linear system, Ax = b, is overconstrained, where A is an m*2n matrix, x is a 2n*1 vector, and b is an m*1 vector, m>>2n. Suppose half of the columns in A are precise and the other half are uncertain with measurable uncertainty C, i.e., 