[Review of] Eric Wertheimer. Imagined Empires: Incas, Aztecs, and the New World of American Literature

Eric Wertheimer convincingly argues that inaccuracy and omission in historical narratives made an indelible mark on American identity in the eighteenth and nineteenth centuries. The ethnic diversity of America, even though sparingly portrayed in the historical writing of the time, also had an important effect on American identity. Wertheimer concludes that while American identity has a public concept, individuals determine the real meaning in private spheres. He examines five Anglo, male authors (Philip Freneau, Joel Barlow, William Prescott, Herman Melville, and Walt Whitman) to ascertain what they thought of as American history and who should be represented in it. These authors incorporated the glorious civilizations of the Incas and Aztecs to draw upon their republican precepts and counterbalance the United States against the imperial nations of Great Britain and Spain; however they erased these indigenous groups when the problem of race crept into the American identity and when the United States began pursuing its own expansionist doctrines of Manifest Destiny and the Monroe Doctrine (which resulted in the less than justifiable Mexican American War and annexation of Texas). Wertheimer argues that Melville was only one among the five to highlight the humanity of the vanquished, although Whitman should be included as well. Melville included the subaltern perspective through the use of silence as a means of their resistance. Melville along with Whitman did not allow glorification of the past to eclipse the reality of the agents and specifically the suffering of the victims

Minimal realizations of linear systems: The "shortest basis" approach

Given a controllable discrete-time linear system C, a shortest basis for C is a set of linearly independent generators for C with the least possible lengths. A basis B is a shortest basis if and only if it has the predictable span property (i.e., has the predictable delay and degree properties, and is non-catastrophic), or alternatively if and only if it has the subsystem basis property (for any interval J, the generators in B whose span is in J is a basis for the subsystem C_J). The dimensions of the minimal state spaces and minimal transition spaces of C are simply the numbers of generators in a shortest basis B that are active at any given state or symbol time, respectively. A minimal linear realization for C in controller canonical form follows directly from a shortest basis for C, and a minimal linear realization for C in observer canonical form follows directly from a shortest basis for the orthogonal system C^\perp. This approach seems conceptually simpler than that of classical minimal realization theory.Comment: 20 pages. Final version, to appear in special issue of IEEE Transactions on Information Theory on "Facets of coding theory: From algorithms to networks," dedicated to Ralf Koette

Hauerwasian Christian Legal Theory

This Essay, which was written for a Law and Contemporary Problems symposium on Stanley Hauerwas, tries to develop an account of public engagement in Hauerwas’ theology. The Essay distinguishes between two kinds of public engagement, “prophetic” and “participatory.” Christian engagement is prophetic when it criticizes or condemns the state, often by urging the state to honor or alter its true principles. In participatory engagement, by contrast, the church intervenes more directly in the political process, as when it works with lawmakers or mobilizes grass roots action. Prophetic engagement is often one-off; participatory engagement is more sustained. Because they worry intensely about the integrity of the church, Hauerwasians are more comfortable with prophetic engagement than the participatory alternative, a tendency the Essay calls the “prophetic temptation.” Hauerwasians also struggle to explain what can or should participatory engagement look like. After first comparing Hauerwas’s understanding of Jesus’s Sermon on the Mount with that of his two twentieth century predecessors, Walter Rauschenbusch and Reinhold Neibuhr, the Essay turns to Hauerwasian public engagement and the prophetic temptation. The Essay then considers the implications of Hauerwas’s theology for three very different social issues, the Civil Rights Movement, abortion, and debt and bankruptcy