Episode #125 of the Stack Overflow podcast is here. We talk Tilde Club and mechanical keyboards. Listen now
majmun

Questions (74)

 7 Proving that a symmetric matrix is positive definite iff all eigenvalues are positive 6 Why can a probability measure be defined over power set of countable sample space? 5 Showing this function on the Cantor set is onto [0,1] 4 Proving that maximizing a sum of functions of different independent variables is equivalent to maximizing each function 4 Intersection of subsets representing flipping a (countably) infinite number of coins

Reputation (706)

 +5 Showing this function on the Cantor set is onto [0,1] +5 Intuition/illustration of difference between supermodularity and increasing differences of a function? +5 Sum of probabilities of Non-disjoint sets can be greater than one? +5 Why can a probability measure be defined over power set of countable sample space?

 2 Equivalance classes example 1 Solving $\max_{x\in\prod_{i=1}^n s_i} \sum_{i=1}^n f(x_i)$ by maximizing for each $i$ individually. 1 Question about definition of separating hyperplanes (theorem) 1 Prove matrix $X'XA$ equals $X'XB$ iff $XA = XB$ 1 Baby Rudin Theorem 2.34.

Tags (75)

 2 elementary-set-theory × 9 1 linear-algebra × 6 1 probability-theory × 21 1 summation × 6 1 measure-theory × 17 1 calculus × 5 1 real-analysis × 8 1 optimization × 5 1 functions × 7 1 convex-analysis × 4