NSF award 2555541 · University of California-Berkeley

FRG: Collaborative Research: Non-Perturbative Analysis for Multi-Dimensional Quasiperiodic Systems

Final report due

28 October 2027

in 375 days · The award ends on 30 June 2027.

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Decide about an extension2 Mar 2027in 135 days
award ending 2027-06-30 · Research.gov
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Extension request16 May 2027in 210 days
award ending 2027-06-30 · Research.gov
PAPPG 24-1: “at least 45 days prior to the end date”
No-cost extension notice20 Jun 2027in 245 days
award ending 2027-06-30 · Research.gov
PAPPG 24-1: “at least ten calendar days prior to the end date”
Final report due28 Oct 2027in 375 days
award ending 2027-06-30 · Research.gov
PAPPG 24-1: “no later than 120-days following the end date of the award”
Project outcomes report due28 Oct 2027in 375 days
award ending 2027-06-30 · Research.gov
PAPPG 24-1: “no later than 120 days following the end date”
Award is closed out28 Oct 2027in 375 days
award ending 2027-06-30 · Research.gov
PAPPG 24-1: “financially closed out 120 days after their expiration date”

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NSF lists this award's end date as 30 June 2027.
NSF rules say the final report is due no later than 120 days after that.
So the final report is due by 28 October 2027.

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Award card

Award number: 2555541
Period of support: 1 Nov 2025 – 30 Jun 2027
Amount: $566,385
Awardee: University of California-Berkeley, Berkeley, CA
Program: ANALYSIS PROGRAM
Directorate: MPS

Abstract

Small denominator problems and quasiperiodic motion appear naturally in classical and quantum systems that have multiple incommensurate frequencies of periodic motion. Examples of such systems exist in celestial mechanics (planetary orbits), biology (population dynamics), solid state physics (quasicrystals), mathematical physics (quasiperiodic Schrodinger operators, or, more generally, time-dependent dynamics in…

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