# Research

My research spans from probability to optimization, from pure math to astronomy. I am particularly interested in designing optical systems for high-contrast imaging with the hope of using such systems to one day take direct images, and eventually spectra, of Earth-like exoplanets.# Talks

## 2021

AstroDynamics*LVASS,*Zoom, Feb 14

Astrophotographs

*AAAP Journal Club Talk,*Zoom, Jan 12

## 2020

Astrophotographs: Things Both Near and Far*Princeton Class of '77,*Zoom, Nov 1

AstroDynamics

*AAAP,*Zoom, May 12

Mercury Transit 2019

*AAAP*Peyton Hall, Princeton University, Mar 10 (cancelled by corona virus)

## 2019

The Parametric Self-Dual Simplex Method: A Modern Perspective*INFORMS Student Chapter*Lehigh, Nov 5

Sudoku via Optimization

*INFORMS*Seattle, Oct 21

The Parametric Self-Dual Simplex Method: A Modern Perspective

*INFORMS*Seattle, Oct 21

Optimization Ideas, Algorithms, Tools, and Examples

*Informal Seminar*Institute for Advanced Study, Sept 26

Fun with M1 and M13

*Coffee Talk*Institute for Advanced Study, Sept 11

The Universe and the Night Sky

*Princeton Public Library*Princeton NJ, Aug 14

Photographing the Night Sky

*Princeton Public Library*Princeton NJ, July 1

Astrophotographs

*Princeton Public Library*Princeton NJ, June 24

Sizing Up The Universe: A Freshman Seminar

*Princeton Club of Western Washington*Seattle WA, June 9

## 2018

Sparsity Matters*INFORMS*Phoenix, Nov 5

Spectroscopy for the Amateur Astrophotographer

*AAAP*, Peyton Hall, Princeton University, Sep 11

Complex Roots of Random Sums

*Optimal Stopping Conference,*Rice Univ., June 26

## 2017

Eclipse of the Century*Montgomery / Rocky Hill Rotary Club,*CVCC, Nov 2

Sparsity Matters

*Khachiyan Prize Talk,*

*INFORMS*Houston, Oct 22

Geometric Visualization of LP Algorithms

*INFORMS*Houston, Oct 22

Sparsity Matters

*Colloquium,*IDA-CCR, Sep 20

Direct Imaging Earth-Like Planets in Habitable Zones

*Wunch*Princeton Univ., Mar 29

Space Mission Concepts to Image Earth-Like Planets

*Amateur Astronomers, Inc.*Union College, Jan 20

## 2016

Numerical Optimization Applied to Space-Related Problems*Cornell, Ctr. for Applied Math*Ithaca NY, Nov 18

Two New Efficient Algorithms for Compressed Sensing

*INFORMS*Nashville, Nov 16

Linear, Conic, and Non-Convex Formulations of the High Contrast Imaging Problem

*MOPTA*, Aug 17

Two New Efficient Algorithms for Compressed Sensing

*INFORMS Int'l,*Hilton Waikoloa, Hawaii, Jun 12

The Earth Is Not Flat

*DIMACS REU*, Rutgers Univ, Jun 7

Space Mission Concepts to Image Earth-Like Planets

*Drexel Univ, Feb 26*

## 2015

Fast Algorithms for LAD Lasso Problems*INFORMS*Philadelphia, Nov 3

Finding Stable Periodic Solutions to the n-Body Problem via Robust Opt.

*INFORMS Philadelphia,*Nov 2

Sizing Up the Universe

*Princeton Alumni Retreat,*Mohonk Mountain Lodge, Oct 3

Numerical Optimization Applied to Space-Related Problems

*MOPTA,*Lehigh Univ., Jul 20

Numerical Optimization Applied to Space-Related Problems

*ISMP 2015,*Jul 16

Numerical Optimization Applied to Space-Related Problems

*Carnegie Mellon Univ., Apr 10*

Operations Scheduling for the LSST

*LSST Scheduler Workshop*, Tucson AZ, Mar 18

Numerical Optimization Applied to Space-Related Problems

*AMS Sectional Meeting*, Georgetown Univ, Mar 8

## 2014

Solving the n-Body Problem by Minimizing the Action Functional*MOPTA*, Lehigh Univ, Aug 15

L

^{1}Regularization via the Parametric Simplex Method

*MOPTA*, Lehigh Univ, Aug 13

Sparsification and Parameterization

*ONR Grantee's Meeting*, MIT, Jun 24

L

^{1}Regularization via the Parametric Simplex Method

*SIOPT*, San Diego, May 19

Local Warming

*WID-DOW*, University of Wisconsin-Madison, May 5

From Bandits to Dishonest Statisticians

*Shepp-Fest*, Columbia University, Apr 25

Imaging The Universe

*AAAP*, Peyton Hall, Princeton University, Apr 8

New Efficient Algorithms for Compressed Sensing

*AMS Sectional Meeting*, Univ. of Maryland, Mar 29

Optimization for Compressed Sensing

*Ind. and Sys. Eng*, University of Florida, Mar 21

New Stable Periodic Solutions to the n-Body Problem

*PACM*, Princeton University, Feb 17

Space Mission Concepts To Image Earth-Like Planets In Habitable Zones

*MEM*, Lehigh University, Jan 31

## 2013

High-Contrast Imaging and the Search for Exo-Earths*Amateur Astronomers, Inc.*, Union College, Sep 20

Fast Fourier Optimization

*MOPTA*, Lehigh Univ., Aug 16

High-Contrast Imaging via Pupil Masking

*AFTA Coronagraph Workshop*, Princeton Univ., July 24

Is Anyone Else Out There?

*AAAP 50th Anniversary Panel*, Institute for Advanced Study, May 11

Fast-Fourier Optimization

*Optimization Days*, GERAD, May 8

Fast-Fourier Optimization

*Industrial and Systems Engineering*, Lehigh Univ., Apr. 3

Fast-Fourier Optimization

*Math Dept.*, Univ. Pennsylvania, Mar. 15

Imaging the Universe

*Butler College*, Princeton Univ, Feb. 20

## 2012

Fast Fourier Optimization*INFORMS*, Phoenix AZ, Oct. 13

Sizing Up The Universe

*S*T*A*R Astronomy Club*, Lincroft NJ, Sep. 6

Fast-Fourier Optimization

*ISMP 2012, Berlin*, Aug. 22

Amateur Astronomy in NJ

*Exploring The Night, South Brunswick Library*, Aug. 7

High-Contrast Imaging via Fast-Fourier Optimization

*SIAM Annual Meeting 2012, Minneapolis*, Jul. 9

Interior Point Methods and Nonlinear Optimization

*Machine Learning Summer School, La Palma*, Apr. 16

Linear Optimization: Duality, Simplex Methods

*Machine Learning Summer School, La Palma*, Apr. 14

Linear Optimization: Methods and Examples

*Machine Learning Summer School, La Palma*, Apr. 14

## 2011

New Pupil Masks for High-Contrast Imaging: Fast-Fourier Optimization*Goddard Space Flight Center*, Dec. 14

Local Warming: Climate Change Comes Home

*Wharton Statistics Dept.*, Nov. 2

Sizing Up The Universe

*Grand Rapids Amateur Astronomical Assn.*, July 6

Sizing Up The Universe

*Montclair State College.*, June 8

Sizing Up The Universe

*UACNJ Astronomy Day, Warren County Library, NJ*, May 14

Sizing Up The Universe

*Yuri's Night*, West Windsor NJ, Apr 12

Taming Diffraction to Search for Exoplanets

*Princeton Center for Theoretical Science*, Apr 7

Local Warming

*GERAD*, Montreal Canada, Mar 17

Local Warming

*INFORMS Computing Society*, Monterey CA, Jan 11

## 2010

Space Mission Concepts to Image Earth-Like Planets in Habitable Zones*American Museum of Natural History*, Dec 6

Sizing Up The Universe

*Montgomery Rotary Club.*, Nov 11

Local Warming

*INFORMS*, Austin TX, Nov 8

Sizing Up The Universe

*UACNJ Jenny Jump*, Oct 29

The Search for Earth-Like Planets

*DIMACS REU Program*, Rutgers University, June 22

The Search for Earth-Like Planets

*Princeton Club of Vero Beach*, Mar 29

The Earth Is Not Flat

*Geometry Class at MHS*, Mar 22

## 2009

Non-Redundant Pupil Masking*Princeton TPF Group*, Nov 6

The Limits of High-Contrast Imaging in Visible Light

*Princeton TPF Group*, Oct 31

New Solutions to the n-Body Problem via NLP

*INFORMS San Diego*, Oct 11

Optimization in Engineering Design

*High-Performance Computing Workshop*, Lehigh University

Direct Imaging of Extrasolar Planets

*StarConn09*, Wesleyan University

Linear Stability of Ring Systems

*PACM, Fine Hall*, Princeton University

Extinguishing Poisson's Spot with Linear Programming

*INFORMS Computing Society*, Charleston SC

## 2008

The Search for Earth-like Planets: Yes We Can*Princeton Alumni Association of Canada*, Toronto

Making Dark Shadows with Linear Programming

*Univ. of Waterloo*

Making Dark Shadows with Linear Programming

*INFORMS, Washington DC*

Optimization in Engineering Design

*MAE, Princeton Univ.*

Extinguishing Poisson's Spot with Linear Programming

*SIAG OPT, Boston*

Digitizing the Universe

*Lunch 'n Learn*

## 2007

Detecting ExtraSolar Planets: A Survey of Methods and Results*PICASso*

Purple America: Using Color to Convey Information

*Politics Department, Princeton Univ.*

Astrophotography

*AstroCon IV*

Stability of Ring Systems with Oblate Central Body

*AstroCon IV*

Detecting ExtraSolar Planets: A Survey of Methods and Results

*NJAA*

Optimized vs. Hypergaussian Occulters: A Comparative Sensitivity Analysis

*NASA Ames*

Parametric Linear Programming and Portfolio Optimization

*Cowles Foundation*, Yale University

High-Contrast Space Occulter

*TPF-Lite Meeting*, Princeton University

Pupil Mapping (aka PIAA)

*TPF-Lite Meeting*, Princeton University

Linear Stability of Ring Systems

*PACM, Fine Hall*, Princeton University

Backyard Astrophotography: A How-To Story

*AAAP*, Peyton Hall, Princeton University

## 2006

Using JAVA Applets to Teach Linear Programming*INFORMS*, Pittsburgh PA, Nov 7

Extreme Optics and the Search for Earth-Like Planets

*ISMP*, Rio de Janeiro, August

Diffraction Analysis of Apodized Pupil Mapping Systems

*SPIE*, Orlando FL

Deep Shadow Occulters

*Nowhere*, April

## 2005

JPL/Princeton TPF Review. Pupils: Masking vs. Mapping*JPL Review*, Princeton University, Nov 5

Searching for Earth-Like Planets

*S*T*A*R Astronomy Club*, Middletown NJ, Oct 6

Diffraction Analysis of 2-D Pupil Remapping for High-Contrast Imaging

*SPIE*, San Diego CA, Aug

Fresnel Analysis of Shaped Pupil Systems for Planet Finding

*SPIE*, San Diego CA, Aug

Horsing Around on Saturn

*New Trends in Astrodynamics II*, Princeton NJ

Frontiers of Stochastically Nondominated Portfolios

*New Horizons talk at Sac Capital Mgmt*

Parametric Linear Programming and Portfolio Optimization

*SIAM Stockholm*

The Search for Earth-Like Planets

*Georgia Tech*

Search for Earth-Like Planets: NASA's Terrestrial Planet Finder Mission

*AAAP*, Peyton Hall, Princeton University

On Fair and Balanced Presentations of Election Results

*PACM*, Fine Hall, Princeton University

## 2004

Engineering Applications of Nonlinear Optimization*INFORMS Denver*

Optimization Problems Arising in Optics and Mechanics

*Center for Applied Mathematics*, Cornell Univ

Astroimages from New Jersey

*UACNJ*, Jenny Jump, Sept

CCD Imaging with Small Instruments in Light-Polluted Skies

*UACNJ*, Jenny Jump, June

Shaped-Pupil Coronagraphs as High-Contrast Imagers for TPF

*LSNSDP*, University of Waterloo

New Orbits for the Equimass n-Body Problem

*LSNSDP*, University of Waterloo

Shaped Pupils (and Other Stuff)

*JPL Review*, Princeton University, Mar 23

## 2003

On Designing NASA's Terrestrial Planet Finder Space Telescope*INFORMS Atlanta*, GA, Oct 20

Nonlinear Optimization Arising in Celestial Mechanics

*INFORMS Atlanta*, GA, Oct 19

New Pupil Masks for High-Contrast Imaging

*SPIE San Diego*, CA, Aug

The Terrestrial Planet Finder Mission

*Starquest'03*, Hope NJ Jun

The Terrestrial Planet Finder Mission

*New Jersey Astronomy Group*, Montclair State University Jun

Engineering Applications of Nonlinear Optimization

*Courant Institute*, NYU May

On Designing NASA's Terrestrial Planet Finder Space Telescope

*Lehigh University*, PA Apr

New Orbits for the Equimass n-Body Problem

*New Trends in Astrodynamics*, College Park MD, Jan

## 2002

Designing a Space Telescope to Image Earth-like Planets*Statistics, Rutgers*

Frontiers of Stochastically Nondominated Portfolios

*IOE Univ. of Michigan*

CCD Astrophotography with a 3.5 inch Questar

*Stella-Della*, Ottsville PA

Terrestrial Planet Finder: Detecting and Characterizing Earth-like Planets Orbiting Nearby Stars

*UACNJ*, Jenny Jump NJ, Sept

Optimal Shaped Pupil Coronagraphs for Extrasolar Planet Finding

*SPIE, Hawaii*

Shape Optimization in Designing the ``Terrestrial Planet Finder'' Telescope

*SIAM, Toronto*

Least Action Principle and the $n$-Body Problem

*PACM*, Feb

Engineering Applications of Nonlinear Optimization

*Oberwolfach workshop on Continuous Optimization with Industrial Applications*

## 2001

Tutorial: New Directions in Linear Programming*INFORMS, Miami Beach*

On Solving SOCPs with an Interior-Point Method for NLP

*INFORMS, Miami Beach*

Solving Trajectory Optimization Problems as Large-Scale NLPs

*INFORMS, Miami Beach*

Interior-Point Methods for Nonlinear Programming

*Large-Scale Optimization*, Erice Sicily

Nonlinear Optimization: Algorithms and Models

*McMaster University*

## 2000

Nonlinear Programming Models: A Survey*NJ INFORMS*, Rutgers University

Recent Progress with an Interior-Point Method for Large-Scale Nonlinear Programming

*ISMP 2000*, Atlanta Georgia

An Interior-Point Algorithm for Nonconvex Nonlinear Programming

*Level(3) Communications*

Interior-Point Methods for Second-Order-Cone and Semidefinite Programming

*25th Lunteren conference on the Mathematics of Operations Research*

An Interior-Point Algorithm for Nonconvex Nonlinear Programming

*25th Lunteren conference on the Mathematics of Operations Research*

Interior-Point Methods for Second-Order-Cone and Semidefinite Programming

*Oberwolfach workshop on Continuous Optimization with Industrial Applications*

## 1999

Using LOQO to Solve Second-Order Cone Programming Problems.*SIAM Conf. on Optimization*, Atlanta GA

Convex Optimization: Interior-Point Methods and Applications.

*Math Dept., Princeton University*

A Martingale System Theorem for Stock Investments

*DIMACS workshop on New Market Models in Finance, Rutgers Univ.*

## 1998

An Interior-Point Algorithm for Nonconvex Nonlinear Programming.*Montreal INFORMS*, Spring

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