Negar Kiyavash

activity

20232026

most citedCausal Effect Identification in LiNGAM Models with Latent Confounders

1 citations · 1 across the 26 of their papers we have counts for

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4 papers · 1 filter

math.OC2026

Sharp First-Order Lower Bounds under $α$ -Polyak-Lojasiewicz Conditions

Saeed Masiha, Negar Kiyavash, Patrick Thiran

We study first-order oracle complexity under the $α$ -Polyak-Lojasiewicz condition $f (x) - f_{⋆} \leq τ ∥\nabla f (x) ∥^{α}$ for $α \in [1, 2]$ . For $α < 2$ , we first show that global $L$ -sm…

math.OC2026

Select-then-differentiate: Solving Bilevel Optimization with Manifold Lower-level Solution Sets

Saeed Masiha, Zebang Shen, Negar Kiyavash +1

We study optimistic bilevel optimization when the lower-level problem has a non-isolated manifold of minimizers. In this setting, the hyper-objective may be non-differentiable beca…

math.OC2025

Superquantile-Gibbs Relaxation for Minima-selection in Bilevel Optimization

Saeed Masiha, Zebang Shen, Negar Kiyavash +1

Bilevel optimization (BLO) becomes more challenging when the lower-level objective admits multiple minimizers. Compared with the commonly studied unique-minimizer setting, this int…

math.OC2024

Optimal Local Convergence Rates of Stochastic First-Order Methods under Local $α$ -PL

Saeed Masiha, Saber Salehkaleybar, Niao He +2

We study the local convergence rate of stochastic first-order methods under a local $α$ -Polyak-Lojasiewicz ( $α$ -PL) condition in a neighborhood of a target connected component $\ma…

Sharp First-Order Lower Bounds under α-Polyak-Lojasiewicz Conditions

Select-then-differentiate: Solving Bilevel Optimization with Manifold Lower-level Solution Sets

Superquantile-Gibbs Relaxation for Minima-selection in Bilevel Optimization

Optimal Local Convergence Rates of Stochastic First-Order Methods under Local α-PL

Sharp First-Order Lower Bounds under $α$ -Polyak-Lojasiewicz Conditions

Optimal Local Convergence Rates of Stochastic First-Order Methods under Local $α$ -PL