Keivan Mallahi-Karai

activity

20122026

most citedFuture exchange rates and Siegel's paradox

3 citations · 4 across the 17 of their papers we have counts for

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6 papers · 1 filter

math.CO2026

On the Dimension of the Best-Worst Choice Polytope

Keivan Mallahi-Karai, Majid Salamat

For a set of $n$ alternatives, the best--worst choice polytope is the convex hull of the deterministic best--worst choice vectors induced by all linear rankings of the alternatives…

math.CO2026

An infinite family of trees with irreducible characteristic polynomials

Saieed Akbari, Keivan Mallahi-Karai

Consider the tree obtained by attaching a leaf to the third vertex of a path with n-1 vertices. In this note, we prove that the characteristic polynomial of this tree is irreducibl…

math.CO2025

Counting $F_{q}$ -points of orbital varieties in ad-nilpotent ideals of type $A_{n}$

Mohammad Bardestani, Keivan Mallahi-Karai, Samrith Ram +1

Let $b_{n} (F_{q})$ denote the Lie algebra of upper triangular $n \times n$ matrices over the finite field $F_{q}$ , and let $u_{n} (F_{q})$ be the ni…

math.CO2017

Polynomial configurations in sets of positive upper density over local fields

Mohammad Bardestani, Keivan Mallahi-Karai

Let $F (x) = (f_{1} (x), \dots, f_{m} (x))$ be such that $1, f_{1}, \dots, f_{m}$ are linearly independent polynomials with real coefficients. Based on ideas of Bachoc, DeCorte, Oliveira and Va…

math.CO2016

Amenability of trees

Behrang Forghani, Keivan Mallahi-Karai

We will give a criterion for the amenability of arbitrary locally finite trees. The criterion is based on the trimming operator which is defined on the space of trees. As an applic…

math.CO2015

On a generalization of the Hadwiger-Nelson problem