An infinitesimal is a numerical quantity small enough that its limit in some condition is zero. Infinitesimals are widely used in calculus, where the formal, limit-based definition of a derivative depends upon an arbitrary additive quantity going to...

Infinitesimals have been used to express the idea of objects so small that there is no way to see them or to measure them. For everyday life, an infinitesimal object is an object which is smaller than any possible measure, whether we measure size, time,...

Abstract: This article presents a rigorous version of the basic model of an increasing-cost competitive industry found in many textbooks. In the model, firms are infinitesimal, which justifies price-taking behavior and a continuous industry supply curve. The industry supply curve slopes upward because...

1. INTRODUCTION In this article we introduce an infinitesimal approach to the construction of robust designs for linear models. The resulting designs are robust against small departures from the assumed linear regression response and/or small departures from the assumption of uncorrelated errors....

To the Editor: Lies, damn lies and defamation. That’s how Mark Twain might have characterized “Come Back to San Gennaro: The Mob Is Deeply Missed” [April 30], a thoroughly slanted depiction of both the Italian-American community and Mulberry Street. For one thing, Little Italy is...

At times wiping away tears, a former interim U.S. attorney who became a key figure in the firing of eight federal prosecutors said his six-month tenure led him to believe that public service was "not worth it."Tim Griffin, a former aide to presidential adviser Karl...