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2025

04 Tuesday Mar 2025
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04:00 PM 05:00 PM

Fifth-Order Bound-, Positivity-, and Equilibrium-Preserving Affine-Invariant AWENO Scheme for Two-Medium γ-based Model of Stiffened Gas

ABSTRACT We describe a quasi-conservative finite difference AWENO scheme with the affine-invariant Z-type nonlinear weights (Ai-AWENO) for the γ-based model....
Venue: B5-311, Yeung Kin Man Academic Building
25 Tuesday Feb 2025
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04:00 PM 05:00 PM

Likelihood asymptotics of stationary Gaussian arrays

ABSTRACT In this talk we will develop the asymptotic likelihood theory for triangular arrays of stationary Gaussian time series depending on a multidimensional unknown parameter....
Venue: B5-208, Yeung Kin Man Academic Building
25 Tuesday Feb 2025
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04:00 PM 05:00 PM

Likelihood asymptotics of stationary Gaussian arrays

ABSTRACT In this talk we will develop the asymptotic likelihood theory for triangular arrays of stationary Gaussian time series depending on a multidimensional unknown parameter....
Venue: B5-208, Yeung Kin Man Academic Building
21 Friday Feb 2025
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10:00 AM 11:00 AM

Monotonicity-based regularization of inverse coefficient problems

ABSTRACT Newly emerging imaging methods lead to the inverse problem of determining one or several coefficient function(s) in an elliptic partial differential equation from (partial) knowledge of it...
Venue: B5-208, Yeung Kin Man Academic Building
19 Wednesday Feb 2025
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11:00 AM 12:00 PM

A quasi-incompressible Chan-Hilliard-Darcy model for two-phase flows in porous media

ABSTRACT Two-phase flows in porous media is known as the Muskat problem. The Muskat problem can be ill-posed....
Venue: Online Via Zoom Registration link: https://cityu.zoom.us/meeting/register/TmS8gvazQFOS-n0Z6A293Q
13 Thursday Feb 2025
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03:00 PM 04:00 PM

Constraint dissolving: a powerful tool for Riemannian optimization

ABSTRACT We propose constraint dissolving approaches for optimization problems over  a class of Riemannian manifolds....
Venue: B5-211, Yeung Kin Man Academic Building
12 Wednesday Feb 2025
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04:00 PM 04:50 PM

Transverse Spectral Instability of Small Periodic Traveling Waves for the Euler-Korteweg System

ABSTRACT In this talk, I will discuss with the transverse spectral instability of the one-dimensional sufficiently small and periodic traveling wave solutions of the (2+1)-dimensional Euler-Korteweg ...
Venue: G5-314, Yeung Kin Man Academic Building
07 Friday Feb 2025
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10:30 AM 11:30 AM

Second-order flow approach for solving variational problems

ABSTRACT In this talk, we introduce a so-called second-order flow approach, a novel computational framework based on dissipative second-order hyperbolic partial differential equations (PDEs) design...
Venue: B5-310, Yeung Kin Man Academic Building
21 Tuesday Jan 2025
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04:00 PM 05:00 PM

Convergence Rates of Robust Limit Theorems under Peng’s Nonlinear Expectations: A Monotone Scheme Analysis

ABSTRACT The Feynman-Kac formula establishes the probabilistic representation of solutions to PDEs, linking the convergence of numerical schemes for PDEs to limit theorems in probability theory....
Venue: Online via Zoom Registration Link: https://cityu.zoom.us/meeting/register/bpnT8g2PSk6N29XH5gRHrw
20 Monday Jan 2025
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04:00 PM 05:00 PM

From incidence geometry to quantum mechanics

ABSTRACT Herr and Kwak had recently established sharp estimates for certain exponential sums on the 3 dimensional torus by counting rectangles in the plane....
Venue: B5-311, Yeung Kin Man Academic Building