4 papers
Physics-Constrained Digital Twins for Sensor Integrity in Urban Pedestrian Flow: Detecting Stealthy False Data Injection with Conformal Guarantees
Oscar Mogollon Gutierrez, Fatemeh Ghasemi, Mohammadhossein Homaei +2
City pedestrian counting systems now feed economic indicators, planning decisions and safety operations, yet the twins built on top of them treat the incoming stream as ground trut…
Fourier Sparsity of Delta Functions and Matching Vector PIRs
Fatemeh Ghasemi, Swastik Kopparty
In this paper we study a basic and natural question about Fourier analysis of Boolean functions, which has applications to the study of Matching Vector based Private Information Re…
Permanental rank versus determinantal rank of random matrices over finite fields
Fatemeh Ghasemi, Gal Gross, Swastik Kopparty
This paper is motivated by basic complexity and probability questions about permanents of random matrices over finite fields, and in particular, about properties separating the per…
Improved PIR Schemes using Matching Vectors and Derivatives
Fatemeh Ghasemi, Swastik Kopparty, Madhu Sudan
In this paper, we construct new t-server Private Information Retrieval (PIR) schemes with communication complexity subpolynomial in the previously best known, for all but finitely…