Search Results for author: Ishani Karmarkar

Found 3 papers, 1 papers with code

Truncated Variance Reduced Value Iteration

no code implementations21 May 2024 Yujia Jin, Ishani Karmarkar, Aaron Sidford, Jiayi Wang

We provide an $\tilde{O}(A_{\text{tot}}[(1 - \gamma)^{-3}\epsilon^{-2} + (1 - \gamma)^{-2}])$-time algorithm in the sampling setting, where the probability transition matrix is unknown but accessible through a generative model which can be queried in $\tilde{O}(1)$-time, and an $\tilde{O}(s + (1-\gamma)^{-2})$-time algorithm in the offline setting where the probability transition matrix is known and $s$-sparse.

From Large to Small Datasets: Size Generalization for Clustering Algorithm Selection

no code implementations22 Feb 2024 Vaggos Chatziafratis, Ishani Karmarkar, Ellen Vitercik

We approach this problem by introducing a notion of size generalization for clustering algorithm accuracy.

Clustering

Real-bogus classification for the Zwicky Transient Facility using deep learning

1 code implementation25 Jul 2019 Dmitry A. Duev, Ashish Mahabal, Frank J. Masci, Matthew J. Graham, Ben Rusholme, Richard Walters, Ishani Karmarkar, Sara Frederick, Mansi M. Kasliwal, Umaa Rebbapragada, Charlotte Ward

Efficient automated detection of flux-transient, reoccurring flux-variable, and moving objects is increasingly important for large-scale astronomical surveys.

Instrumentation and Methods for Astrophysics

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