Examples & Exercises 1. 1. Let f: X ~ X be an invertible transformation. Show that
for all integers m and n.
1.2. A transformation f : ~ ~ ~ is defined by f (x) = 2x for all x E ~. Is f invertible? Find a formula for Jon (x) that applies for all integers n.
1.3. A transformation f: [0, 1] ~ [0, 1] is defined by f(x) = ~x. Is this transformation one-to-one? Onto? Invertible?
1.4. The mapping f: [0, 1] ~ [0, 1] is defined by f(x) = 4x · (1-x). Is this transformation one-to-one? Onto? Is it invertible?
1.5. Let C denote the Classical Cantor Set. This subset of the metric space [0, 1] is obtained by successive deletion of middle-third open subintervals as follows. We construct a nested sequence of closed intervals