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- “Lines having specified contact with projective varieties,”
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*Amer. Math. Monthly***94**(1987), no. 1, 62–68.

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- “Multiple-point formulas and line complexes,”
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- “Schubert's coincidence formulas for line complexes and the
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- “A higher-order contact formula for plane curves” (with G.
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- “Triple and quadruple contact of plane curves,” (with G.
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- “Differentiating between the presidential candidates,”
*MAA FOCUS,*September, 1992, p. 8.

- “Calculus in the brewery,”
*The College Mathematics Journal,***25**(1994), no. 3, 226–227.

- “The enumeration of simultaneous higher-order contacts between
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*Vector Calculus,*Prentice Hall, 1997 (copyright 1998).

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- “Detecting flat normal cones using Segre classes” (with G.
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*Vector Calculus,*Prentice Hall, 2nd ed., 2001 (copyright 2002).

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*Math Horizons,*November 2001, Volume IX, Issue 2, pp. 25 and 28.

- “Calculus, pi, and the machine age,”
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- “Tangential quantum cohomology of arbitrary order” (with G.
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- Review of T. Michaelides,
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- Review of S. J. Ceci and W. M. Williams, The Mathematics of Sex: How Biology
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*Vector Calculus,*4th ed., Pearson, Boston, 2011 (copyright 2012).

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- “Algebra, Analysis, and Eating Corn,” MAA FOCUS, October/November, 2013, p. 7.

- “Computing Severi degrees with long-edge graphs” (with F. Block and
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