The recent success of neural networks enables a better interpretation of 3D point clouds, but processing a large-scale 3D scene remains a challenging problem. Most current approaches divide a large-scale scene into small regions and combine the local predictions together. However, this scheme inevitably involves additional stages for pre- and post-processing and may also degrade the final output due to predictions in a local perspective. This talk introduces Fast Point Transformer that consists of a new lightweight self-attention layer. Our approach encodes continuous 3D coordinates, and the voxel hashing-based architecture boosts computational efficiency. The proposed method is demonstrated with 3D semantic segmentation and 3D detection. The accuracy of our approach is competitive to the best voxel-based method, and our network achieves 129 times faster inference time than the state-of-the-art, Point Transformer, with a reasonable accuracy trade-off in 3D semantic segmentation on S3DIS dataset.

For information on how to join, please see:  https://cmsa.fas.harvard.edu/seminars-and-colloquium/

On June 6–8, the Harvard CMSA will host the 2022 Symposium on Foundations of Responsible Computing (FORC).

The symposium will be held in hybrid format. It will be in-person at Room G10, CMSA, located at 20 Garden Street, Cambridge, MA and also streamed on Zoom Webinar.

The Symposium on Foundations of Responsible Computing (FORC) is a forum for mathematical research in computation and society writ large. The Symposium aims to catalyze the formation of a community supportive of the application of theoretical computer science, statistics, economics, and other relevant analytical fields to problems of pressing and anticipated societal concern.

In-person registration is required. Register here to attend in-person.

Zoom registration is required to receive the webinar link. Register here to attend virtually.

For more information, please see the event webpage: https://cmsa.fas.harvard.edu/2022-forc/

Organizers: Cynthia Dwork, Harvard SEAS | Omer Reingold, Stanford | Elisa Celis, Yale

Keynote Speakers:

Isaac Kohane, Harvard Medical School

Caroline Nobo, Yale

Nuria Oliver, Data-Pop Alliance

Speakers:

Sushant Agarwal, University of Waterloo

Hedyeh Beyhaghi, Carnegie Mellon University

Sadia Chowdhury, York University

Aloni Cohen, University of Chicago

Emily Diana, University of Pennsylvania

Elbert Du, Harvard University

Matthew Eichhorn, Cornell University

Badih Ghazi, Google Research

Keegan Harris, Carnegie Mellon University

Shengyuan Hu, Carnegie Mellon University

Mahbod Majid, University of Waterloo

Georgy Noarov, University of Pennsylvania

Rojin Rezvan, University of Texas at Austin

Kunal Talwar, Apple

Giuseppe Vietri, University of Minnesota

Jiayuan Ye, National University of Singapore

Christina Yu, Cornell University

Mingxun Zhou, Carnegie Mellon University

Samson Zhou, Carnegie Mellon University

Tijana Zrnic, University of California, Berkeley

https://cmsa.fas.harvard.edu/2022-forc/

On June 6–8, the Harvard CMSA will host the 2022 Symposium on Foundations of Responsible Computing (FORC).

The symposium will be held in hybrid format. It will be in-person at Room G10, CMSA, located at 20 Garden Street, Cambridge, MA and also streamed on Zoom Webinar.

The Symposium on Foundations of Responsible Computing (FORC) is a forum for mathematical research in computation and society writ large. The Symposium aims to catalyze the formation of a community supportive of the application of theoretical computer science, statistics, economics, and other relevant analytical fields to problems of pressing and anticipated societal concern.

In-person registration is required. Register here to attend in-person.

Zoom registration is required to receive the webinar link. Register here to attend virtually.

For more information, please see the event webpage: https://cmsa.fas.harvard.edu/2022-forc/

Organizers: Cynthia Dwork, Harvard SEAS | Omer Reingold, Stanford | Elisa Celis, Yale

Keynote Speakers:

Isaac Kohane, Harvard Medical School

Caroline Nobo, Yale

Nuria Oliver, Data-Pop Alliance

Speakers:

Sushant Agarwal, University of Waterloo

Hedyeh Beyhaghi, Carnegie Mellon University

Sadia Chowdhury, York University

Aloni Cohen, University of Chicago

Emily Diana, University of Pennsylvania

Elbert Du, Harvard University

Matthew Eichhorn, Cornell University

Badih Ghazi, Google Research

Keegan Harris, Carnegie Mellon University

Shengyuan Hu, Carnegie Mellon University

Mahbod Majid, University of Waterloo

Georgy Noarov, University of Pennsylvania

Rojin Rezvan, University of Texas at Austin

Kunal Talwar, Apple

Giuseppe Vietri, University of Minnesota

Jiayuan Ye, National University of Singapore

Christina Yu, Cornell University

Mingxun Zhou, Carnegie Mellon University

Samson Zhou, Carnegie Mellon University

Tijana Zrnic, University of California, Berkeley

https://cmsa.fas.harvard.edu/2022-forc/

Parameterized quantum circuits (PQCs) are the leading proposal for near-term quantum computing, with applications including electronic structure, dynamical simulation, and solving linear systems. However, there has recently been major progress in understanding the training landscapes for PQCs, and the results paint a concerning picture. Exponentially vanishing gradients, known as barren plateaus, have been shown to occur for various situations, including circuits that are either deep or noisy or that generate much entanglement. This can lead to exponential resource scaling for algorithms based on PQCs. On the flip side, some architectures for PQCs have been proven to be immune to barren plateaus. Moreover, the dynamical Lie algebra for a PQC has been connected to presence or absence of barren plateaus, leading to an algebraic theory for the trainability of PQCs. This theory could allow us to engineer favorable training landscapes for PQCs. In this talk, I will overview our theoretical understanding of PQCs training landscapes and how we might engineer them to achieve scalability for near-term quantum computing.

https://harvard.zoom.us/j/779283357?pwd=MitXVm1pYUlJVzZqT3lwV2pCT1ZUQT09

On June 6–8, the Harvard CMSA will host the 2022 Symposium on Foundations of Responsible Computing (FORC).

The symposium will be held in hybrid format. It will be in-person at Room G10, CMSA, located at 20 Garden Street, Cambridge, MA and also streamed on Zoom Webinar.

The Symposium on Foundations of Responsible Computing (FORC) is a forum for mathematical research in computation and society writ large. The Symposium aims to catalyze the formation of a community supportive of the application of theoretical computer science, statistics, economics, and other relevant analytical fields to problems of pressing and anticipated societal concern.

In-person registration is required. Register here to attend in-person.

Zoom registration is required to receive the webinar link. Register here to attend virtually.

For more information, please see the event webpage: https://cmsa.fas.harvard.edu/2022-forc/

Organizers: Cynthia Dwork, Harvard SEAS | Omer Reingold, Stanford | Elisa Celis, Yale

Keynote Speakers:

Isaac Kohane, Harvard Medical School

Caroline Nobo, Yale

Nuria Oliver, Data-Pop Alliance

Speakers:

Sushant Agarwal, University of Waterloo

Hedyeh Beyhaghi, Carnegie Mellon University

Sadia Chowdhury, York University

Aloni Cohen, University of Chicago

Emily Diana, University of Pennsylvania

Elbert Du, Harvard University

Matthew Eichhorn, Cornell University

Badih Ghazi, Google Research

Keegan Harris, Carnegie Mellon University

Shengyuan Hu, Carnegie Mellon University

Mahbod Majid, University of Waterloo

Georgy Noarov, University of Pennsylvania

Rojin Rezvan, University of Texas at Austin

Kunal Talwar, Apple

Giuseppe Vietri, University of Minnesota

Jiayuan Ye, National University of Singapore

Christina Yu, Cornell University

Mingxun Zhou, Carnegie Mellon University

Samson Zhou, Carnegie Mellon University

Tijana Zrnic, University of California, Berkeley

https://cmsa.fas.harvard.edu/2022-forc/

Conference Poster

View photos from the colloquium here.

Confirmed speakers

Serge Cantat, Université de Rennes I
Danny Calegari, University of Chicago
Laura DeMarco, Harvard University
Benson Farb, University of Chicago
Michael Freedman, Microsoft
John Hubbard, Cornell University and Unversité de Provence
Hee Oh, Yale University
Peter Sarnak, Princeton University
Dennis Sullivan, Stony Brook University and CUNY Graduate Center
Anton Zorich, CNRS-Université Pierre et Marie Curie

Schedule

Download PDF for a detailed schedule of lectures and events.

Please join us for a RECEPTION at 5:15 p.m. on Wednesday, June 15, at The Austine & Chilton McDonnell Common Room on the 4th floor of the Science Center.

Additional events for former students and invited guests on Saturday, June 18.

All lectures will take place in Hall C, Science Center, 1 Oxford Street, Cambridge, MA, 02138.

Registration

Everyone is welcome but please fill out the registration form before you come!

Register Here

Organizers:

Laura DeMarco (Harvard University)
Sarah Koch (University of Michigan)
Ronen Mukamel (Brigham and Women’s Hospital and Harvard Medical School)
Kevin Pilgrim (Indiana University)

Sponsors

This conference is sponsored by Harvard University, Northwestern University, Rice University, Indiana University, the Clay Mathematics Institute, and the National Science Foundation.

The conference is supported by NSF Grant DMS-1952662. There are funds available for participant support, which will be allocated in keeping with NSF guideline – students, recent PhDs, underrepresented groups, and people with no other federal support get priority. Requests for support should be sent to the email address: circle.conference.2022@gmail.com

For all other inquiries, please write to mcmullenconf2020@math.harvard.edu

Harvard University is committed to maintaining a safe and healthy educational and work environment in which no member of the University community is, on the basis of sex, sexual orientation, or gender identity, excluded from participation in, denied the benefits of, or subjected to discrimination in any University program or activity. More information can be found here.

Conference Poster

View photos from the colloquium here.

Confirmed speakers

Serge Cantat, Université de Rennes I
Danny Calegari, University of Chicago
Laura DeMarco, Harvard University
Benson Farb, University of Chicago
Michael Freedman, Microsoft
John Hubbard, Cornell University and Unversité de Provence
Hee Oh, Yale University
Peter Sarnak, Princeton University
Dennis Sullivan, Stony Brook University and CUNY Graduate Center
Anton Zorich, CNRS-Université Pierre et Marie Curie

Schedule

Download PDF for a detailed schedule of lectures and events.

Please join us for a RECEPTION at 5:15 p.m. on Wednesday, June 15, at The Austine & Chilton McDonnell Common Room on the 4th floor of the Science Center.

Additional events for former students and invited guests on Saturday, June 18.

All lectures will take place in Hall C, Science Center, 1 Oxford Street, Cambridge, MA, 02138.

Registration

Everyone is welcome but please fill out the registration form before you come!

Register Here

Organizers:

Laura DeMarco (Harvard University)
Sarah Koch (University of Michigan)
Ronen Mukamel (Brigham and Women’s Hospital and Harvard Medical School)
Kevin Pilgrim (Indiana University)

Sponsors

This conference is sponsored by Harvard University, Northwestern University, Rice University, Indiana University, the Clay Mathematics Institute, and the National Science Foundation.

The conference is supported by NSF Grant DMS-1952662. There are funds available for participant support, which will be allocated in keeping with NSF guideline – students, recent PhDs, underrepresented groups, and people with no other federal support get priority. Requests for support should be sent to the email address: circle.conference.2022@gmail.com

For all other inquiries, please write to mcmullenconf2020@math.harvard.edu

Harvard University is committed to maintaining a safe and healthy educational and work environment in which no member of the University community is, on the basis of sex, sexual orientation, or gender identity, excluded from participation in, denied the benefits of, or subjected to discrimination in any University program or activity. More information can be found here.

Surface hopping algorithm is widely used in chemistry for mixed quantum-classical dynamics. In this talk, we will discuss some of our recent works in mathematical understanding and algorithm development for surface hopping methods. These methods are based on stochastic approximations of semiclassical path-integral representation to the solution of multi-level Schrodinger equations; such methodology also extends to other high dimensional transport systems.

Conference Poster

View photos from the colloquium here.

Confirmed speakers

Serge Cantat, Université de Rennes I
Danny Calegari, University of Chicago
Laura DeMarco, Harvard University
Benson Farb, University of Chicago
Michael Freedman, Microsoft
John Hubbard, Cornell University and Unversité de Provence
Hee Oh, Yale University
Peter Sarnak, Princeton University
Dennis Sullivan, Stony Brook University and CUNY Graduate Center
Anton Zorich, CNRS-Université Pierre et Marie Curie

Schedule

Download PDF for a detailed schedule of lectures and events.

Please join us for a RECEPTION at 5:15 p.m. on Wednesday, June 15, at The Austine & Chilton McDonnell Common Room on the 4th floor of the Science Center.

Additional events for former students and invited guests on Saturday, June 18.

All lectures will take place in Hall C, Science Center, 1 Oxford Street, Cambridge, MA, 02138.

Registration

Everyone is welcome but please fill out the registration form before you come!

Register Here

Organizers:

Laura DeMarco (Harvard University)
Sarah Koch (University of Michigan)
Ronen Mukamel (Brigham and Women’s Hospital and Harvard Medical School)
Kevin Pilgrim (Indiana University)

Sponsors

This conference is sponsored by Harvard University, Northwestern University, Rice University, Indiana University, the Clay Mathematics Institute, and the National Science Foundation.

The conference is supported by NSF Grant DMS-1952662. There are funds available for participant support, which will be allocated in keeping with NSF guideline – students, recent PhDs, underrepresented groups, and people with no other federal support get priority. Requests for support should be sent to the email address: circle.conference.2022@gmail.com

For all other inquiries, please write to mcmullenconf2020@math.harvard.edu

Harvard University is committed to maintaining a safe and healthy educational and work environment in which no member of the University community is, on the basis of sex, sexual orientation, or gender identity, excluded from participation in, denied the benefits of, or subjected to discrimination in any University program or activity. More information can be found here.

On June 21–24, 2022, the Harvard Black Hole Initiative and the CMSA will host the Joint BHI/CMSA Conference on Flat Holography (and related topics).

The recent discovery of infinitely-many soft symmetries for all quantum theories of gravity in asymptotically flat space has provided a promising starting point for a bottom-up construction of a holographic dual for the real world. Recent developments have brought together previously disparate studies of soft theorems, asymptotic symmetries, twistor theory, asymptotically flat black holes and their microscopic duals, self-dual gravity, and celestial scattering amplitudes, and link directly to AdS/CFT.

The conference will be held in room G10 of the CMSA, located at 20 Garden Street, Cambridge, MA.

All non-Harvard affiliated visitors to the CMSA building are required to complete this covid form prior to arrival: https://forms.gle/xKykcNcXq7ciZuvJ8

Registration is required for this in-person event.

For more information, please see the event webpage: cmsa.fas.harvard.edu/flat-holography

Organizers: Daniel Kapec, CMSA | Andrew Strominger, BHI | Shing-Tung Yau, Harvard and Tsinghua

Confirmed Speakers:

• Nima Arkani-Hamed, IAS
• Shamik Banerjee, Bhubaneswar, Inst. Phys.
• Miguel Campiglia, Republica U., Montevido
• Geoffrey Compere, Brussels
• Laura Donnay, Vienna
• Netta Engelhardt, MIT
• Laurent Freidel, Perimeter
• Alex Lupsasca, Princeton
• Juan Maldacena, IAS
• Lionel Mason, Oxford
• Natalie Paquette, U. Washington
• Sabrina Pasterski, Princeton/Perimeter
• Andrea Puhm, Ecole Polytechnique
• Ana-Maria Raclariu, Perimeter
• Marcus Spradlin, Brown
• Tomasz Taylor, Northeastern
• Herman Verlinde, Princeton
• Anastasia Volovich, Brown
• Bin Zhu, Northeastern

On June 21–24, 2022, the Harvard Black Hole Initiative and the CMSA will host the Joint BHI/CMSA Conference on Flat Holography (and related topics).

The recent discovery of infinitely-many soft symmetries for all quantum theories of gravity in asymptotically flat space has provided a promising starting point for a bottom-up construction of a holographic dual for the real world. Recent developments have brought together previously disparate studies of soft theorems, asymptotic symmetries, twistor theory, asymptotically flat black holes and their microscopic duals, self-dual gravity, and celestial scattering amplitudes, and link directly to AdS/CFT.

The conference will be held in room G10 of the CMSA, located at 20 Garden Street, Cambridge, MA.

All non-Harvard affiliated visitors to the CMSA building are required to complete this covid form prior to arrival: https://forms.gle/xKykcNcXq7ciZuvJ8

Registration is required for this in-person event.

For more information, please see the event webpage: cmsa.fas.harvard.edu/flat-holography

Organizers: Daniel Kapec, CMSA | Andrew Strominger, BHI | Shing-Tung Yau, Harvard and Tsinghua

Confirmed Speakers:

• Nima Arkani-Hamed, IAS
• Shamik Banerjee, Bhubaneswar, Inst. Phys.
• Miguel Campiglia, Republica U., Montevido
• Geoffrey Compere, Brussels
• Laura Donnay, Vienna
• Netta Engelhardt, MIT
• Laurent Freidel, Perimeter
• Alex Lupsasca, Princeton
• Juan Maldacena, IAS
• Lionel Mason, Oxford
• Natalie Paquette, U. Washington
• Sabrina Pasterski, Princeton/Perimeter
• Andrea Puhm, Ecole Polytechnique
• Ana-Maria Raclariu, Perimeter
• Marcus Spradlin, Brown
• Tomasz Taylor, Northeastern
• Herman Verlinde, Princeton
• Anastasia Volovich, Brown
• Bin Zhu, Northeastern

On June 21–24, 2022, the Harvard Black Hole Initiative and the CMSA will host the Joint BHI/CMSA Conference on Flat Holography (and related topics).

The recent discovery of infinitely-many soft symmetries for all quantum theories of gravity in asymptotically flat space has provided a promising starting point for a bottom-up construction of a holographic dual for the real world. Recent developments have brought together previously disparate studies of soft theorems, asymptotic symmetries, twistor theory, asymptotically flat black holes and their microscopic duals, self-dual gravity, and celestial scattering amplitudes, and link directly to AdS/CFT.

The conference will be held in room G10 of the CMSA, located at 20 Garden Street, Cambridge, MA.

All non-Harvard affiliated visitors to the CMSA building are required to complete this covid form prior to arrival: https://forms.gle/xKykcNcXq7ciZuvJ8

Registration is required for this in-person event.

For more information, please see the event webpage: cmsa.fas.harvard.edu/flat-holography

Organizers: Daniel Kapec, CMSA | Andrew Strominger, BHI | Shing-Tung Yau, Harvard and Tsinghua

Confirmed Speakers:

• Nima Arkani-Hamed, IAS
• Shamik Banerjee, Bhubaneswar, Inst. Phys.
• Miguel Campiglia, Republica U., Montevido
• Geoffrey Compere, Brussels
• Laura Donnay, Vienna
• Netta Engelhardt, MIT
• Laurent Freidel, Perimeter
• Alex Lupsasca, Princeton
• Juan Maldacena, IAS
• Lionel Mason, Oxford
• Natalie Paquette, U. Washington
• Sabrina Pasterski, Princeton/Perimeter
• Andrea Puhm, Ecole Polytechnique
• Ana-Maria Raclariu, Perimeter
• Marcus Spradlin, Brown
• Tomasz Taylor, Northeastern
• Herman Verlinde, Princeton
• Anastasia Volovich, Brown
• Bin Zhu, Northeastern

The statistical analysis of genomic data has incubated many innovations for computational method development. This talk will discuss some simple algorithms that may be useful in analyzing such data. Examples include algorithms for efficient resampling-based hypothesis testing, minimizing the sum of truncated convex functions, and fitting equality-constrained lasso problems. These algorithms have the potential to be used in other applications beyond statistical genomics.

This seminar will be located in Science Center 530 and on Zoom.University of Michigan  For more details, please see: https://cmsa.fas.harvard.edu/interdisciplinary-science-seminar/

The statistical analysis of genomic data has incubated many innovations for computational method development. This talk will discuss some simple algorithms that may be useful in analyzing such data. Examples include algorithms for efficient resampling-based hypothesis testing, minimizing the sum of truncated convex functions, and fitting equality-constrained lasso problems. These algorithms have the potential to be used in other applications beyond statistical genomics.

For information on how to join, please see:  https://cmsa.fas.harvard.edu/seminars-and-colloquium/

On June 21–24, 2022, the Harvard Black Hole Initiative and the CMSA will host the Joint BHI/CMSA Conference on Flat Holography (and related topics).

The recent discovery of infinitely-many soft symmetries for all quantum theories of gravity in asymptotically flat space has provided a promising starting point for a bottom-up construction of a holographic dual for the real world. Recent developments have brought together previously disparate studies of soft theorems, asymptotic symmetries, twistor theory, asymptotically flat black holes and their microscopic duals, self-dual gravity, and celestial scattering amplitudes, and link directly to AdS/CFT.

The conference will be held in room G10 of the CMSA, located at 20 Garden Street, Cambridge, MA.

All non-Harvard affiliated visitors to the CMSA building are required to complete this covid form prior to arrival: https://forms.gle/xKykcNcXq7ciZuvJ8

Registration is required for this in-person event.

For more information, please see the event webpage: cmsa.fas.harvard.edu/flat-holography

Organizers: Daniel Kapec, CMSA | Andrew Strominger, BHI | Shing-Tung Yau, Harvard and Tsinghua

Confirmed Speakers:

• Nima Arkani-Hamed, IAS
• Shamik Banerjee, Bhubaneswar, Inst. Phys.
• Miguel Campiglia, Republica U., Montevido
• Geoffrey Compere, Brussels
• Laura Donnay, Vienna
• Netta Engelhardt, MIT
• Laurent Freidel, Perimeter
• Alex Lupsasca, Princeton
• Juan Maldacena, IAS
• Lionel Mason, Oxford
• Natalie Paquette, U. Washington
• Sabrina Pasterski, Princeton/Perimeter
• Andrea Puhm, Ecole Polytechnique
• Ana-Maria Raclariu, Perimeter
• Marcus Spradlin, Brown
• Tomasz Taylor, Northeastern
• Herman Verlinde, Princeton
• Anastasia Volovich, Brown
• Bin Zhu, Northeastern

For information on how to join, please go to: https://cmsa.fas.harvard.edu/interdisciplinary-science-seminar

In this talk, we will study a relationship between conformally invariant boundary conditions and anomalies of conformal field theories (CFTs) in 1+1 dimensions. For a given CFT with a global symmetry, we consider symmetric gapping potentials which are relevant perturbations to the CFT. If a gapping potential is introduced only in a subregion of the system, it provides a certain boundary condition to the CFT. From this equivalence, if there exists a Cardy boundary state which is invariant under a symmetry, then the CFT can be gapped with a unique ground state by adding the corresponding gapping potential. This means that the symmetry of the CFT is anomaly free. Using this approach, we will systematically deduce the anomaly-free conditions for various types of CFTs with several different symmetries. When the symmetry of the CFT is anomalous, it implies a Lieb- Schultz-Mattis type ingappability of the system. Our results are consistent with, where available, known results in the literature. Moreover, we extend the discussion to other symmetries including spin groups and generalized time-reversal symmetries. As an application, we propose 1d LSM theorem involving magnetic space group symmetries on the lattice. The extended LSM theorems apply to systems with a broader class of spin interactions, such as Dzyaloshinskii-Moriya interactions and chiral three-spin interactions.

https://harvard.zoom.us/j/977347126
Password: cmsa