Upcoming

There are currently no upcoming events.

    Past

    All years2023202220212017

    All Events

    Winter STAR workshop 2023

    Date:
    29
    Sunday
    January
    2023
    -
    03
    Friday
    February
    2023
    Lecture / Seminar
    Time: 00:00
    Organizer: Faculty of Mathematics and Computer Science
    Winter STAR workshop 2023 Lecture / Seminar website

    Hanukkah STAR - mini workshop 2022

    Date:
    29
    Thursday
    December
    2022
    -
    30
    Friday
    December
    2022
    Lecture / Seminar
    Time: 00:00
    Location: Jacob Ziskind Building
    Organizer: Faculty of Mathematics and Computer Science
    Gallery: Hanukkah STAR - mini workshop 2022 Gallery
    Hanukkah STAR - mini workshop 2022 Lecture / Seminar website

    Pre-SAAC Symposium

    Date:
    23
    Sunday
    October
    2022
    Lecture / Seminar
    Time: 14:30-18:00
    Location: Dolfi and Lola Ebner Auditorium
    Organizer: Faculty of Mathematics and Computer Science
    Contact: Sharon.Rom@weizmann.ac.il
    Pre-SAAC Symposium Lecture / Seminar website

    Algebraic Geometry and Representation Theory Seminar

    Date:
    08
    Thursday
    September
    2022
    Lecture / Seminar
    Time: 11:00
    Title: sdsff
    Location: The David Lopatie Hall of Graduate Studies
    Lecturer: dsf
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il

    The Summer STARS 2022 workshop

    Date:
    29
    Sunday
    May
    2022
    Lecture / Seminar
    Time: 00:00
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Details: Summer STARS Workshop 2022 May 29, June 1-2, 2022 WEBPAGE https://sites.google ... Read more Summer STARS Workshop 2022 May 29, June 1-2, 2022 WEBPAGE https://sites.google.com/view/summerstars2022/home
    Close details
    The Summer STARS 2022 workshop Lecture / Seminar website

    THEORY AVANT GARDE, A Workshop in Honor of Moni Naor

    Date:
    25
    Wednesday
    May
    2022
    -
    26
    Thursday
    May
    2022
    Lecture / Seminar
    Time: 00:00
    Location: Dolfi and Lola Ebner Auditorium
    Organizer: Faculty of Mathematics and Computer Science
    Contact: Sharon.Rom@weizmann.ac.il
    Details: Organizing Committee: Cynthia Dwork, Harvard University Amos Fiat, Tel Aviv Un ... Read more Organizing Committee: Cynthia Dwork, Harvard University Amos Fiat, Tel Aviv University Seffi Naor, Technion Omer Reingold, Stanford University Guy Rothblum, Weizmann Insititute of Science Alon Rosen, Bocconi University Sponsors The Chorafas Institute for Scientific Exchange
    Close details
    THEORY AVANT GARDE, A Workshop in Honor of Moni Naor Lecture / Seminar website

    Vision and AI

    Date:
    30
    Thursday
    December
    2021
    Lecture / Seminar
    Time: 12:15-13:30
    Title: tbd
    Location: Jacob Ziskind Building
    Lecturer: Dror Moran
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il

    Faculty Seminar

    Date:
    28
    Tuesday
    December
    2021
    Lecture / Seminar
    Time: 11:15-12:15
    Title: Approximating the Arboricity in Sublinear Time
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Details: We consider the problem of approximating the arboricity of a graph $G=(V,E)$, wh ... Read more We consider the problem of approximating the arboricity of a graph $G=(V,E)$, which we denote by $arb(G)$, in sublinear time, where the arboricity of a graph is the minimal number of forests required to cover its edges. An algorithm for this problem may perform degree and neighbor queries, and is allowed a small error probability. We design an algorithm that outputs an estimate $hat{alpha}$, such that with probability $1-1/poly(n)$, $arb(G)/c log2 n leq hat{alpha} leq arb(G)$ , where $n=|V|$ and $c$ is a constant. The expected query complexity and running time of the algorithm are $O(n/arb(G))cdot poly(log n)$, and this upper bound also holds with high probability. This bound is optimal for such an approximation up to a $poly(log n)$ factor. This result has important implications as many sublinear-time algorithms are parameterized by the arboricity, and rely on getting its value as input. Based on joint work with Saleet Mossel and Dana Ron.
    Close details

    Foundations of Computer Science Seminar

    Date:
    13
    Monday
    December
    2021
    Lecture / Seminar
    Time: 11:15-12:15
    Title: New Diameter Reducing Shortcuts: Breaking the $O(sqrt{n})$ Barrier
    Location: Jacob Ziskind Building
    Lecturer: Merav Parter
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Details: For an $n$-vertex digraph $G=(V,E)$, a emph{shortcut set} is a (small) subset of ... Read more For an $n$-vertex digraph $G=(V,E)$, a emph{shortcut set} is a (small) subset of edges $H$ taken from the transitive closure of $G$ that, when added to $G$ guarantees that the diameter of $G cup H$ is small. Shortcut sets, introduced by Thorup in 1993, have a wide range of applications in algorithm design, especially in the context of parallel, distributed and dynamic computation on directed graphs. A folklore result in this context shows that every $n$-vertex digraph admits a shortcut set of linear size (i.e., of $O(n)$ edges) that reduces the diameter to $widetilde{O}(sqrt{n})$. Despite extensive research over the years, the question of whether one can reduce the diameter to $o(sqrt{n})$ with $widetilde{O}(n)$ shortcut edges has been left open. In this talk, I will present the first improved diameter-sparsity tradeoff for this problem, breaking the $sqrt{n}$ diameter barrier. Specifically, we show an $O(n^{omega})$-time randomized algorithm for computing a linear shortcut set that reduces the diameter of the digraph to $widetilde{O}(n^{1/3})$. We also extend our algorithms to provide improved $(eta,epsilon)$ hopsets for $n$-vertex weighted directed graphs. Joint work with Shimon Kogan.
    Close details

    Algebraic Geometry and Representation Theory Seminar

    Date:
    24
    Wednesday
    November
    2021
    Lecture / Seminar
    Time: 13:00-14:00
    Title: Exceptional zeros of twisted triple product p-adic L-functions
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: p-adic L-functions involve modified p-factors which measure the discrepancy betw ... Read more p-adic L-functions involve modified p-factors which measure the discrepancy between the p-adic and complex L-values in the interpolation formula. It is a puzzling fact that this factor can vanish at the central point. Then the p-adic L-function trivially vanish at the point, and such a zero is called an exceptional zero. The p-adic L-function of an elliptic curve has an exceptional zero if and only if it has split multiplicative reduction at p, and the precise relation between derivative of the p-adic L-function and the algebraic part of the complex L-value was conjectured by Mazur-Tate-Teitelbaum and proved by Greenberg-Stevens. 　 There have been many attempts to extend this result of Greenberg-Stevens to more general automorphic forms. In this talk I will consider the exceptional zeros of the cyclotomic twisted triple product p-adic L-function associated to elliptic curves over rationals and a real quadratic field, and prove an identity between derivatives of the p-adic L-function and complex L-values. I will also consider exceptional zeros of a certain p-adic L-function of degree 6 associated with two rational elliptic curves. This is a joint work with Ming-Lun Hsieh.
    Close abstract

    Vision and AI

    Date:
    18
    Thursday
    November
    2021
    Lecture / Seminar
    Time: 12:15-13:30
    Lecturer: Ori Perel
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il

    Vision and AI

    Date:
    18
    Thursday
    November
    2021
    Lecture / Seminar
    Time: 12:15-13:30
    Lecturer: Ori Perel
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il

    Superalgebra Theory and Representations Seminar

    Date:
    10
    Wednesday
    November
    2021
    Lecture / Seminar
    Time: 19:15-20:30
    Title: ROOT COMPONENTS FOR TENSOR PRODUCT OF AFFINE KAC-MOODY LIE ALGEBRA MODULES.
    Lecturer: Shrawan Kumar
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Details: This is a joint work with Samuel Jeralds. Let g be an ane Kac-Moody Lie algebra ... Read more This is a joint work with Samuel Jeralds. Let g be an ane Kac-Moody Lie algebra and let 
    Close details

    Superalgebra Theory and Representations Seminar

    Date:
    01
    Monday
    November
    2021
    Lecture / Seminar
    Time: 10:55
    Title: ROOT COMPONENTS FOR TENSOR PRODUCT OF AFFINE KAC-MOODY LIE ALGEBRA MODULES.
    Lecturer: Shrawan Kumar
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Details: This is a joint work with Samuel Jeralds. Let g be an ane Kac-Moody Lie algebra ... Read more This is a joint work with Samuel Jeralds. Let g be an ane Kac-Moody Lie algebra and let 
    Close details

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: CRITERIA FOR THE ZERO FIBER OF A MOMENT MAP TO HAVE RATIONAL SINGULARITIES, AND ... Read more CRITERIA FOR THE ZERO FIBER OF A MOMENT MAP TO HAVE RATIONAL SINGULARITIES, AND APPLICATIONS. Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    13
    Wednesday
    October
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    20
    Monday
    September
    2021
    Lecture / Seminar
    Time: 11:20
    Title: Criteria for the zero fiber of a moment map to have rational singularities and applications
    Lecturer: Gerald Schwarz
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Let G be a complex reductive group with Lie algebra g and let V be a G-module. T ... Read more Let G be a complex reductive group with Lie algebra g and let V be a G-module. There is a natural moment mapping : V  V  ! g and we denote 
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    16
    Wednesday
    June
    2021
    Lecture / Seminar
    Time: 14:30-15:25
    Title: Multiplicity one theorems over positive characteristic
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il

    Vision and Robotics Seminar

    Date:
    13
    Thursday
    May
    2021
    Lecture / Seminar
    Time: 10:15-11:30
    Title: Deep Internal Learning
    Lecturer: Assaf Shocher
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: Deep Learning has always been divided into two phases: Training and Inference. ... Read more Deep Learning has always been divided into two phases: Training and Inference. The common practice for Deep Learning is training big networks on huge datasets. While very successful, such networks are only applicable to the type of data they were trained for and require huge amounts of annotated data, which in many cases are not available. In my thesis (guided by Prof. Irani), I invented ``Deep Internal Learning''. Instead of learning to generally solve a task for all inputs, we perform ``ad hoc'' learning for specific input. We train an image-specific network, we do it at test-time and on the test-input only, in an unsupervised manner (no label or ground-truth). In this regime, training is actually a part of the inference, no additional data or prior training is taking place. I will demonstrate how we applied this framework for various challenges: Super-Resolution, Segmentation, Dehazing, Transparency-Separation, Watermark removal. I will also show how this approach can be incorporated to Generative Adversarial Networks by training a GAN on a single image. If time permits I will also cover some partially related works. Links to papers: http://www.wisdom.weizmann.ac.il/~vision/zssr http://www.wisdom.weizmann.ac.il/~vision/DoubleDIP http://www.wisdom.weizmann.ac.il/~vision/ingan http://www.wisdom.weizmann.ac.il/~vision/kernelgan https://semantic-pyramid.github.io/ https://arxiv.org/abs/2006.11120 https://arxiv.org/abs/2103.15545
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    12
    Wednesday
    May
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: The Burger-Sarnak Method and Operations on the Unitary Duals of Classical Groups
    Lecturer: Andrew Hendrickson
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: The Burger-Sarnak method shows that the restriction of an automorphic representa ... Read more The Burger-Sarnak method shows that the restriction of an automorphic representation of a reductive group to a reductive subgroup has automorphic support. Clozel has conjectured a qualitative refinement of this result, which was first verified and quantified in the GLn case by Venkatesh. In this talk I will describe my thesis which extended this result to classical groups.
    Close abstract

    Algebraic Geometry and Representation Theory Seminar

    Date:
    12
    Wednesday
    May
    2021
    Lecture / Seminar
    Time: 14:30-15:30
    Title: The Burger-Sarnak Method and Operations on the Unitary Duals of Classical Groups
    Lecturer: Andrew Hendrickson
    Organizer: Faculty of Mathematics and Computer Science
    Contact: hanni.naor@weizmann.ac.il
    Abstract: The Burger-Sarnak method shows that the restriction of an automorphic representa ... Read more The Burger-Sarnak method shows that the restriction of an automorphic representation of a reductive group to a reductive subgroup has automorphic support. Clozel has conjectured a qualitative refinement of this result, which was first verified and quantified in the GLn case by Venkatesh. In this talk I will describe my thesis which extended this result to classical groups.
    Close abstract

    Faculty Summer Event

    Date:
    14
    Thursday
    September
    2017
    Retreat
    Time: 18:30-22:00
    Location: Campus Recreation Center
    Organizer: Faculty of Mathematics and Computer Science
    Contact: alona.sandler@weizmann.ac.il

    Example 1 for internal event node

    Date:
    08
    Monday
    May
    2017
    -
    10
    Wednesday
    May
    2017
    Retreat
    Time: 10:00 - 12:30
    Location: David Lopatie Conference Centre ...
    Organizer: Department of ...
    Contact: weizmann@weizmann.ac.il

    Example 2 for internal event node

    Date:
    08
    Monday
    May
    2017
    -
    10
    Wednesday
    May
    2017
    Retreat
    Time: 10:00 - 12:30
    Location: David Lopatie Conference Centre ...
    Organizer: Department of ...
    Contact: weizmann@weizmann.ac.il