## Recent Papers Available online |

A Bijective Proof of an Unusual Symmetric Group
Generating Function |

The Action of the Hall-Littlewood Vertex Operator |

A Macdonald Vertex Operator and Tableaux Statistics for the Two-Column
(q,t)-Kostka Coefficients, Electronic
Journal of Combinatorics, 5, R45, also summary in Proceedings
of FPSAC '99 |

Vertex operators for standard bases of the symmetric functions,
J. of Alg. Comb., 13, No. 1 (2000), pp. 83-101. (available
math.CO) |

Positivity for special cases of (q,t)-Kostka coefficients and standard
tableaux statistics,Electronic
Journal of Combinatorics, 6, R41 |

(with Mark Shimozono) Hall-Littlewood vertex operators and generalized
Kostka polynomials, Adv. in Math., 158 (2001), pp. 66-85.
(avaliable math.QA) |

Ribbon Operators and Hall-Littlewood Symmetric Functions, Adv.
in Math., 156 (2000), pp. 33-43. (available
math.QA) |

(with Adriano Garsia) Polynomiality of the q,t-Kostka
Revisited, to appear in issue in honor of G. C. Rota, (available
math.QA) |

q-Analogs of symmetric function operators,
to appear Discrete Math. (available
math.QA) |

(with Adriano Garsia) A primer of plethystic notation,
(in preparation) |

(with Rosa Orellana) Some remarks on the characters
of the general Lie superalgebra, (available
math.CO) |

(with N. Bergeron) q and q,t-Analogs of Non-commutative Symmetric
Functions, (available
math.CO) |

(with G. Tudose) q-Analogs of Q-Schur functions, (available
math.CO) (extended abstract) |

## Talks and posters |

PDF
of slides for talk "q-Analogs of Hopf Algebra Structures" given
in Kyoto Aug '01 |

PDF
of poster presented at FPSAC'01 in Scottsdale, Arizona June '01 "The
ribbon rule for homogeneous symmetric functions" (extended
abstract) |

PDF of slides for talk
"A quantization of non-commutative symmetric functions" at
the CMS Winter meeting '01 and updated for a seminar at UWaterloo June,
'02. This is similar to the chalk talk that I presented at several combinatorics
seminars (York, UMinnesota, UQaM) Fall '01. |

PDF
of slides "Ribbons and Column Strict Tableaux" presented at
the Univeristy of Miami and York University colloquium Feb '02. |

PDF
of slides "A q-analog of Schur's Q-functions" presented at the
Wilfrid Laurier University April '02. Description
of this research. |

FPSAC '02. "Hall-Littlewood analogs in the Q-function
algebra" (PDF
slides) and "q and qt analogs of non-commutative symmetric functions."
(PDF
slides) |

A Java program to play a game of extended "Set." I learned a lot about the work that has been done on the game of "Set" at the FPSAC '01 conference where I gave a demo of this program, but I have not had the chance to rewrite the material on the web page to reflect that. |

A gallery of posets. Pictures of permutahedron and other geometric shapes arising from posets. |