... closed and boundedinterval. denoted [a, b], 2. (X E Rla < x < b), an open and bounded interval, denoted (a, b), 3. (x E R( a 5 x < b), a closed-open and bounded interval, ... into cases, and counterexample, are also studied. Solved examples and exercises calling for the writing of proofs are selected from set theory, intermediate algebra, trigonometry, elementary ... standard junior-senior courses. Flexibility. Bridging courses in mathematics are by no means an estab- lished or standardized part of the undergraduate curriculum. Indeed, PREFACE ix among...