A CM Elliptic Curve Framework For Deterministic Primality Proving On Numbers Of Special Form

Speaker: 

Alexander Abatzoglou

Institution: 

University of California, Irvine, Math. Department

Time: 

Tuesday, March 11, 2014 - 9:00am

Location: 

Rowland Hall 440R

Advisor - Prof. Alice Silverberg
Abstract - For any imaginary quadratic field $K$, number field $F$ containing the Hilbert class field of $K$,  elliptic curve $E / F$ with complex multiplication by $K$, and  sequence of numbers $F_k$ of "special" form we give an efficient deterministic primality (and compositeness) test on $F_k$.  These primality tests are an extension of the Lucas primality test to the setting of elliptic curves.  In particular, for every prime $p$ in the sequence $F_k$, we need to know $|E(\Z / p\Z)|$.  To satisfy this requirement we restrict to the setting of CM elliptic curves. 

Lowering the consistency strength of square principles at singular cardinals

Speaker: 

Ryan Holben

Institution: 

UC Irvine, Math. Department

Time: 

Thursday, August 8, 2013 - 1:30pm

Location: 

Rowland Hall 340P

Committee members: Matthew Foreman, Penelope Maddy, Martin Zeman (chair)

Abstract: Jensen's square principle is an important combinatorial object.
The failure of this principle is independent of ZFC and at singular
cardinals this has high consistency strength. We outline two results in
which we greatly lower the known consistency strengths using Prikry-type
forcings.

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