Gary Lee Stonum English Department, Case Western Reserve University Cleveland, OH 44106 gary.stonum@case.edu Marcia Birken and Anne C. Coon, Discovering Patterns in Mathematics and Poetry, Amsterdam and New York: Rodopi, 2008. Internationale Forschungen zur Allgemeinen und Vergleichenden Literaturwissenschaft, vol 116. 213 pp. Professors of mathematics and of literature respectively, Marcia Birken and Anne C. Coon emphasize the overlap of their fields in Discovering Patterns in Mathematics and Poetry, They aim to allay the wariness that each side of the disciplinary divide has sometimes held for the other. And although ultimately conceding that the “works of mathematicians and poets are fundamentally different, as are the ways we approach and study those works,” for the most part Birken and Coon delight in identifying what they see as the similarities between theorems and poems. The chief similarity is pattern itself. Poems and mathematical concepts are both obviously structured objects, and both have at least some claim to having been found by their creators as much as invented by them. Moreover, in mathematics structures and patterns are often the content of the object as well as its form. Birken and Coon accordingly introduce several branches of mathematics that exemplify structure most clearly: number theory, fractal geometry, and transformation symmetries. Although they pay some attention to how these branches were invented and how mathematicians have developed them, they focus on the amateur’s learning of and about what professional mathematicians have previously established. If in mathematics structure is a clear, often rigorously defined and demonstrable property, on the literary side things are a bit softer. Birken and Coon understandably downplay theme and meaning in order to emphasize rhyme, meter and stanza form, and they attend most enthusiastically to relatively uncommon but highly patterned forms: villanelles, sestinas, and visually shaped poetry. Noticing verbal, visual, and aural patterns can be an important aspect of poetry’s pleasures, but such structures manifestly do not occupy so central a place in poetry as their counterparts do in mathematics, and only in special cases are a poem’s structural properties its content as well as its form. Furthermore, although patterns can be discovered in poetry and mathematics, so can they be in most endeavors. Consider dog breeding, where patterns of canine behavior and appearance are of the essence. Is mere pattern sufficient grounds for linking otherwise distinct enterprises? It would be if the two influenced one another significantly or if, as Poe’s M. Dupin claims, the linkage revealed something neither poets nor mathematicians knew without the other. Birken and Coon do not make such strong claims, however, and they do not quote Poe. Their accounts of the interaction between mathematics and poetry consistently flow downhill from the latter to the former. As a goal and a value pattern belongs first and foremost to the mathematicians. Indeed, the strongest links cited between mathematics and arts are not to poetry but to M.C. Escher, every math geek’s favorite artist. Birken and Coon do cite numerous poems explicitly about mathematics and note a number of authors influenced by math: Emily Dickinson, Alice Fulton, Ron Silliman, Inger Christensen, et al. More strikingly, they offhandedly suggest a distinctive take on the mechanisms of literary production. Diane Der-Hovanessian’s “Fractals,” draws explicitly on Edna St. Vincent Millay’s “Euclid alone has looked on Beauty bare,” installing for kudos Benoit Mandelbrot where Millay had praised Euclid. Such use of an older text by a newer one is hardly unfamiliar, of course, but Birken and Coon interestingly propose thinking of the later poem as an iteration of the earlier one. Iteration, the use of recursive formulas to produce new objects out of old, differs from influence, allusion, and similar ideas in emphasizing the systemic properties of the literary corpus rather than the acts and intentions of authors. A new structuralism? They apply the same notion to the development of metaphor in Shakespeare’s sonnet 73. Such matters of advanced literary criticism are otherwise foreign to Discovering Patterns, which despite the publication circumstances is not addressed to research in comparative literature or any of its usual tributaries. For one thing, although some attention is paid to non-anglophone writers, all of them are quoted in English translation, and nearly all the other poets mentioned are 20th-century Americans. More important, at heart and in rhetoric the book is addressed not to scholars but to undergraduates (and common readers) who are largely unfamiliar with either poetry or mathematics and who are fearful of either or both. One indication of this is that the authors consistently address their readers in the second person pedagogical: “If you enjoy the challenge of thinking creatively within a complicated framework, you might like to try your hand at writing a sestina.” Indeed, the book originates in a course that the authors have taught for several years at the Rochester Institute of Technology. The course and hence the book would seem to have be meant for those (engineers? pre-meds?) who had stereotypically had read little verse, who were competent enough with the drill-and-fill mathematics of lower-division calculus, but who neither appreciated poetry nor had encountered the sort of imaginative activity real math majors cherish. For scholars in comparative literature and interdisciplinary studies the book’s contribution is thus limited. As an introduction to poetic form for those unfamiliar with verse, Discovering Patterns is accurate but painfully elementary by comparison to most textbooks on the subject. As an introduction to mathematical ideas for those who fear math, it fares better. Although considerably less challenging than such popularizers as Martin Gardner or Douglas Hofstadter, Birken and Coon do admirably introduce some basic ideas and, more important, the excitement and the aesthetic pleasure that discovering these ideas can elicit.