clrs; typos
clrs; exercise 9.1.1 - 2nd min in n + ⎡lgn⎤ - 2
clrs; exercise 9.1.2 - lower bound on min/max comparisons
clrs; exercise 9.2.1 - no 0-length array calls
clrs; exercise 9.2.2 - independence of partitioning
clrs; exercise 9.2.3 - iterative RANDOMIZED-SELECT
clrs; exercise 9.2.4 - worst-case partitioning