S. Chakraborty

activity

20182026

most citedPrivate key and password protection by steganographic image encryption

1 citations · 1 across the 14 of their papers we have counts for

collaborators

16 papers

math.AG2026

$A^{1}$ -connectedness of moduli of vector bundles on a stacky curve

Sujoy Chakraborty, Saurav Holme Choudhury, Rakesh Pawar

Let $C$ be a projective stacky curve over an infinite field $k$ with the coarse space $C$ , a geometrically connected smooth projective curve, together with a generating…

math.AG2026

Artin-Schreier Root Stacks and lifts of group actions

Sujoy Chakraborty, Souradeep Majumder

Let $G$ be a connected affine algebraic group defined over a field of positive characteristic. We prove that the action of $G$ on a smooth projective variety can be lifted to its a…

math.AG2026

Brauer group of moduli of stable parabolic $SL (r, C)$ and $PGL (r, C)$ -connections and Higgs bundles over a curve

Pavan Adroja, Sujoy Chakraborty

Let $X$ be a compact Riemann surface of genus at least $3$ . We compute the Brauer groups of the moduli spaces of stable parabolic $SL (r, C)$ -connections and stable s…

math.AG2026

Brauer group of moduli stacks of parabolic principal bundles over a curve

Indranil Biswas, Sujoy Chakraborty

We prove that the Brauer group of the moduli stack of parabolic stable principal $PGL (r, C)$ -bundles on a curve $X$ , for a generic system of weights along an arbitra…

math.AG2025

$A^{1}$ --connectedness of moduli stack of semi-stable and parabolic semi-stable vector bundles over a curve

Sujoy Chakraborty, Saurav Holme Choudhury

Let $C$ be an irreducible smooth projective curve of genus $g \geq 2$ over an algebraically closed field. We prove that the moduli stack of semi-stable vector bundles on $C$ of fixe…

math.AG2025

Brauer group of moduli stack of parabolic $PSp (r, C)$ --bundles over a curve

Indranil Biswas, Sujoy Chakraborty, Arijit Dey

Take an irreducible smooth complex projective curve $X$ of genus $g$ , with $g \geq 3$ . Let $r$ be an even positive integer. We prove that the Brauer group of the moduli stack of…

cs.CR2025★ 1 cited

Private key and password protection by steganographic image encryption

Debesh Choudhury, Sujoy Chakraborty

We propose a technique to protect and preserve a private key or a passcode in an encrypted two-dimensional graphical image. The plaintext private key or the passcode is converted i…

math.AG2025

Brauer group of moduli of parabolic symplectic bundles

Indranil Biswas, Sujoy Chakraborty, Arijit Dey

Let $X$ be a smooth connected complex projective curve of genus $g$ , with $g \geq 3$ . Fix an integer $r \geq 2$ , a finite subset $D \subset X$ , and a line bundle $L$ on $X$ .…

math.AG2024

Equivariant Parabolic connections and stack of roots

Sujoy Chakraborty, Arjun Paul

Let $X$ be a smooth complex projective variety equipped with an action of a linear algebraic group $G$ over $C$ . Let $D$ be a reduced effective divisor on $X$ that is inva…

math.AG2023

Orthogonal and Symplectic Parabolic Connections and Stack of Roots

Sujoy Chakraborty, Souradeep Majumder

Let $D$ be an effective divisor on a smooth projective variety $X$ over an algebraically closed field $k$ of characteristic $0$ . We show that there is a one-to-one correspondence b…

math.AG2023

Real Structures on Root Stacks and Parabolic Connections

Sujoy Chakraborty, Arjun Paul

Let $D$ be a reduced effective strict normal crossing divisor on a smooth complex variety $X$ , and let $X_{D}$ be an associated root stack over $C$ . Suppose that $…

math.AG2022

Chen--Ruan cohomology and orbifold Euler characteristic of moduli spaces of parabolic bundles

Indranil Biswas, Sujoy Chakraborty, Arijit Dey

We consider the moduli space of stable parabolic Higgs bundles of rank $r$ and fixed determinant, and having full flag quasi-parabolic structures over an arbitrary parabolic diviso…

math.AG2022

Brauer group of moduli stack of stable parabolic $PGL (r)$ -bundles over a curve

Indranil Biswas, Sujoy Chakraborty, Arijit Dey

Let $k$ be an algebraically closed field of characteristic zero. We prove that the Brauer group of moduli stack of stable parabolic $PGL (r, k)$ -bundles with full flag q…

math.AG2020

On Abel-Jacobi maps of moduli of parabolic bundles over a curve

Sujoy Chakraborty

Let $C$ be a nonsingular complex projective curve, and $L$ e a line bundle of degree 1 on $C$ . Let $M_{α} := M (r, L, α)$ denote the moduli space…

math.AG2019

Chow Group of 1-cycles of the Moduli of Parabolic Bundles Over a Curve

Sujoy Chakraborty

We study the Chow group of 1-cycles of the moduli space of semistable parabolic vector bundles of fixed rank, determinant and a generic weight over a nonsingular projective curve o…

math.AG2018

Picard group and fundamental group of the moduli of Higgs bundles on curves

Sujoy Chakraborty, Arjun Paul

Let $X$ be an irreducible smooth projective curve of genus $g \geq 2$ over $C$ . Let $G$ be a connected reductive affine algebraic group over $C$ . Let $\mathrm{M}_…

A1-connectedness of moduli of vector bundles on a stacky curve

Artin-Schreier Root Stacks and lifts of group actions

Brauer group of moduli of stable parabolic SL(r,C) and PGL(r,C)-connections and Higgs bundles over a curve

Brauer group of moduli stacks of parabolic principal bundles over a curve

A1--connectedness of moduli stack of semi-stable and parabolic semi-stable vector bundles over a curve

Brauer group of moduli stack of parabolic PSp(r,C)--bundles over a curve

Private key and password protection by steganographic image encryption

Brauer group of moduli of parabolic symplectic bundles

Equivariant Parabolic connections and stack of roots

Orthogonal and Symplectic Parabolic Connections and Stack of Roots

Real Structures on Root Stacks and Parabolic Connections

Chen--Ruan cohomology and orbifold Euler characteristic of moduli spaces of parabolic bundles

Brauer group of moduli stack of stable parabolic PGL(r)-bundles over a curve

On Abel-Jacobi maps of moduli of parabolic bundles over a curve

Chow Group of 1-cycles of the Moduli of Parabolic Bundles Over a Curve

Picard group and fundamental group of the moduli of Higgs bundles on curves

$A^{1}$ -connectedness of moduli of vector bundles on a stacky curve

Brauer group of moduli of stable parabolic $SL (r, C)$ and $PGL (r, C)$ -connections and Higgs bundles over a curve

$A^{1}$ --connectedness of moduli stack of semi-stable and parabolic semi-stable vector bundles over a curve

Brauer group of moduli stack of parabolic $PSp (r, C)$ --bundles over a curve

Brauer group of moduli stack of stable parabolic $PGL (r)$ -bundles over a curve