Our next task is to study supersymmetric gauge theory with one hypermultiplet in the doublet representation. This is often called the theory with one flavor, or more simply . We will see that all the methods employed in the last section are readily adapted to this theory, too. We again follow the presentation of the original paper [3], but we use the Seiberg-Witten curve in a form more suitable for the generalization later. Appendix C of [48] is a good source where many different forms of the Seiberg-Witten curves of theories are summarized.