Pfaffian

pfaffian English Alternative forms en pfaffian Pronunciation en /ˈfæfɪən/ Etymology 1 From en Pfaff ian, after Johann Friedrich Pfaff. Noun en mathematics The determinant of a skew-symmetric matrix, capable of being written as the square of a polynomial in the matrix entries. en Algebraic Combinatorics 113 Chris Godsil 1993 If A is a skew symmetric matrix then det A is the square of a polynomial in the entries of A. This polynomial is known as the Pfaffian of A, and we denote it by Sym(pf A). https://books.google.com/books?id=eADtlNCkkIMC&lpg=PA113&dq=%22Pfaffian%22&pg=PA113#v=onepage&q=%22Pfaffian%22&f=false Pfaffians Etymology 2 After Charles Ignatious Pfaff, the founder of the restaurant. Noun en historical A member of a circle of artists that met at Pfaff's beer cellar Pfaff's, a restaurant on Broadway. en The Conservator Charles E. Hurd, assistant editor of the Boston Transcript, has published in the Commercial Bulletin an academic account of the literary Bohemia of New York at the time the Pfaffians flourished and Ada Clare, Whitman's friend, reigned as its queen. https://books.google.com/books?id=AkArAAAAYAAJ&dq=%22the%20Pfaffians%22&pg=PA185#v=onepage&q=%22the%20Pfaffians%22&f=false March 1897 en The Conservative Press in Eighteenth-and Nineteenth-century America Ronald Lora 1999 While the publication became noted for its conservatism, the Pfaffians, inspired by the writings of Henri Murger and visits to Parisian bohemian quarters, avowedly dismissed the restraints of convention and pursued a freewheeling personal lifestyle. https://books.google.com/books?id=fRpKaRzq6OMC&lpg=PA140&dq=%22the%20Pfaffians%22&pg=PA140#v=onepage&q=%22the%20Pfaffians%22&f=false 140 en Bohemia in America, 1858–1920 70 Joanna Levin 2009 SHORTLY AFTER THE PFAFFIANS announced their version of la vie bohème in the Saturday Press, the mythos of Bohemia traveled to San Francisco. https://books.google.com/books?id=_y_n3pS74T4C&lpg=PA70&dq=%22Pfaffians%22&pg=PA70#v=onepage&q=%22Pfaffians%22&f=false en eponyms