Definitions

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. The determinant of a skew-symmetric matrix, capable of being written as the square of a polynomial in the matrix entries.

Etymologies

Pfaff +‎ -ian, after Johann Friedrich Pfaff. (Wiktionary)

Examples

  • One example that I do understand, since I’ve read the paper many times, is Hori and Tong’s “proof” of Rodland’s Conjecture: that the Pfaffian in the Grassmannian G (2,7) lives on the same kahler moduli space as a hypersurface Calabi Yau in a Grassmannian.

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