Colloquium abstracts

Santosh Nadimpalli
TIFR
November 12, 2015

Typical representations for certain Bernstein components of $GL_n(F)$:  The indecomposable blocks of the category of smooth representations of a $p$-adic reductive group $G$ are determined by Bernstein and these blocks are called Bernstein components. Let $F$ be a non-Archimedean local field with ring of integers $integers{F}$ and finite residue field. If $G$ is $g{n}{F}$ and $s$ is any given Bernstein component it follows from the Bushnell and Kutzko's work that there exists irreducible smooth representation $ au_s$ of $g{n}{integers{F}}$ such that for any irreducible smooth representation $pi$ of $G$ $$ho_{g{n}{integers{F}}}( au_s, pi) eq 0$$ if and only if $pi$ belongs to the Bernstein component $s$. For applications in arithmetic it was required to classify such representations $ au_s$ usually called typical representation. We will try to present such a classification result for ``non-cuspidal'' Bernstein components.