ISI Chennai Centre

Name	Affliation	Date	Title
Sourish Das	Chennai Mathematical Institute	20 Jan 2026	Understanding Statistics behind Large Language Models
Sankha S Basu	IIIT - Delhi	27 Jan 2026	Topological semantics for a non-self-extensional LFI
Shital Saha	Dayananda Sagar University	03 Feb 2026	Copula-based information measures and dependence in bivariate distributions
Chinh T. Hoang	Wilfrid Laurier Univ., Canada	10 Apr 2026	PROBLEMS ON GRAPH COLOURING
Dr. Mathew C Francis	Dept. of CSE, IIT Palakkad	08 May 2026	THE WEAK TOTAL COLOURING CONJECTURE
Prof. Mridul Nandi	Applied Statistics Unit, Indian Statistical Institute, Kolkata	01 Jun 2026	How transparent is the current EVM System in India?

Name	Affliation	Date	Title
Arni S. R. Srinivasa Rao	Medical College of Georgia, Augusta, USA	14 Feb 2025	Exact Deep Learning Machines
Dr. Anantha Padmanabha	Department of Computer Science & Engineering, IIT Madras	27 Feb 2025	Consistent Query Answering under Primary Keys
Diptimaya Behara	ISI Chennai	17 Jul 2025	AVD Total Coloring of 3-Degenerate Graphs
Siddharth Namachivayam	Carnegie Mellon University	31 Jul 2025	Resource Bounded Randomness for Instantiating Cryptographic Security
Angeliya C U	ISI Chennai	12 Aug 2025	Chromatic bounds of some families of graphs
Manoj Belavadi	Wilfrid Laurier University	13 Aug 2025	Recoloring: Structure and Decomposition
Akshay Dhan	ISI Chennai	26 Aug 2025	Optimising implementation of linear layers
Dr. Rupel Nargunam	Madras School of Economics	09 Sep 2025	The Importance of Statistics within Actuarial Mathematics
Saptarshi Sahoo	ISI Chennai	07 Oct 2025	Reasoning in Sabotage Games
Avijeet Ghosh	Chennai Mathematical Institute	21 Oct 2025	Complexity Study of Reasoning about Knowledge and Public Observations
Sujata Ghosh	ISI Chennai	04 Nov 2025	What drives people's choices in simple turn-taking games?
Sreejith K P	IIT Madras	18 Nov 2025	Arborescences and shortest path trees when colors matter

Name	Affliation	Date	Title
Dr. Sanjukta Roy	Pennsylvania State University	01 Jun 2023	Optimality and Starategyproofness in Voting

Name	Affliation	Date	Title
Shibasish Dasgupta	Global Data Insight & Analytics, Ford Motor Private Limited	12 Jan 2018	A Bayesian Predictive Approach to Design Studies for Comparing Biomarkers
B V Rao	Chennai Mathematical Institute	02 Feb 2018	Urn Models
Ravindra B. Bapat	ISI Delhi	07 Feb 2018	The number of spanning trees in a Ferrers graph
Marc Hallin	European Center for Advanced Research in Economics and Statistics (ECARES)	09 Feb 2018	On Multivariate Distribution and Quantile Functions, Ranks and Signs: A measure transportation approach
B V Rao	Chennai Mathematical Institute	16 Feb 2018	Random Walk
T Krishnan	Chennai Mathematical Institute	16 Feb 2018	Basics of EM Algorithm
Sibasish Ghosh	The Institute of Mathematical Sciences (IMSc)	02 Mar 2018	Witnessing arbitrary bipartite entanglement in a measurement-device-independent way
Ashmita Gupta	Wageningen University, Netherlands	09 Mar 2018	Female labor as insurance: Trade Liberalization and Female Labor Force Participation in India
B V Rao	Chennai Mathematical Institute	16 Mar 2018	Brownian Motion
T Krishnan	Chennai Mathematical Institute	16 Mar 2018	Basics of EM Algorithm
B V Rao	Chennai Mathematical Institute	23 Mar 2018	Martingales
T Krishnan	Chennai Mathematical Institute	23 Mar 2018	Statistics: Some caveats
Purba Das	Chennai Mathematical Institute	06 Apr 2018	Understanding Sea Ice Melting via Functional Data Analysis
Arnab Chakrabarti	ISI Chennai	20 Apr 2018	Limiting Spectral Distribution of High Dimensional Hayashiâ€™s Estimator in Presence of Asynchronicity for pâ„nâ†’0
Suparna Biswas	ISI Chennai	12 Sep 2018	Kernel Based Estimation of Spectral Risk Measures

Name	Affliation	Date	Title
Prof. Hira L. Koul	Michigan State University, East Lansing, U. S. A	23 Jan 2017	Minimum distance estimation in additive models: A brief review
Dr. A. Antony Selvan	Institute of Mathematical Sciences, Chennai.	17 Feb 2017	Sampling Theory in Shift-invariant Spaces
Dr. T. V. H. Prathamesh	Institute of Mathematical Sciences, Chennai.	06 Apr 2017	Mechanising Knot Theory
Prof. Jayant V. Deshpande	Chennai Mathematical Institute	21 Apr 2017	Some issues in Reliability Theory
Dr. Nasim Akhtar	Indian Institute of Technology, Guwahati	12 May 2017	DIMENSIONS OF THE GRAPHS OF alpha-FRACTAL INTERPOLATION FUNCTIONS
Dr. Sumit Kumar Pandey	R. C. Bose Centre for Cryptology & Security, ISI, Kolkata	06 Jun 2017	Recursive MDS Diffusion Layers
Sujata Ghosh	ISI Chennai	11 Aug 2017	Can game-theoretic rationality explain human behavior in simple turn-taking games ?
Prabuddha Chakraborty	ISI Chennai	18 Aug 2017	The interplay of quantum mechanics, randomness and microscopic interactions in low (d=2) spatial dimensions.
Partha Sarathi Chakraborty	The Institute of Mathematical Sciences	01 Sep 2017	Fun with Probability
S. Ramasubramanian	Chennai Mathematical Institute	08 Sep 2017	Cramer-Lundberg model revisited
Arup Bose	Indian Statistical Institute	20 Sep 2017	Introduction to large random matrices.
Md Firoz Ali	Department of Mathematics, Indian Institute of Technology Kharagpur	26 Sep 2017	Logarithmic coefficients of some close-to-convex functions
Arun K. Tangirala	Department of Chemical Engineering, IIT Madras	06 Oct 2017	Data-driven reconstruction of causal graphs for multivariate stationary processes
Sudheesh K. Kattumannil	ISI Chennai	13 Oct 2017	Analysis of Recall based Time to Event data: A Hazard Rate approach
Suparna Biswas	Tezpur University	27 Oct 2017	Estimation and Applications of Some Risk Measures in Finance
Anjana S.	ISI Chennai	03 Nov 2017	Test for independence between time to failure and cause of failure in competing risks with k causes of failure
M. Seetharama Gowda	University of Maryland, Baltimore County	23 Nov 2017	The Lyapunov rank of a proper cone
Nalini Ravishanker	University of Connecticut	15 Dec 2017	Modeling Financial Durations Using Penalized Estimating Functions
Anirban Chakraborti	Jawaharlal Nehru University	22 Dec 2017	Socio-economic inequalities: Can humans be modeled like atoms?

Name	Affliation	Date	Title
Mr. Parthiban Natarajan	VIT University	21 Jan 2016	Embedding Parameters in Interconnection Networks
Dr. Amal Dev Manuel	University of Warsaw	04 Feb 2016	Combinatorial expressions and lower bounds.
Dr. Laxmi Kant Raut	Office of Policy, Division of Economic Research, U. S. A.	19 Feb 2016	Intergenerational long-term effects of preschool-structural estimates from a discrete dynamic programming model.
Prof. Swadesh Kumar Sahoo	IIT Indore	23 Mar 2016	On quasihyperbolic metric and its importance
Prof. Jaydeb Sarkar	Indian Statistical Institute, Bangalore center.	01 Apr 2016	Hilbert Module Approach to Operator Theory
Dr. Pranav Haridas	Indian Institute of Technology, Madras.	28 Jul 2016	Quadrature domains in C^n
Arnab Chakrabarti	Indian Statistical Institute, Chennai center.	06 Oct 2016	Bootstrap Method for Analysis of Dependent Data
Dr. Madhuparna Karmakar	Institute of Mathematical Sciences, Chennai.	21 Oct 2016	Population imbalanced Fermi superfluid
Dr. Sanjeev Singh	Indian Institute of Technology, Madras.	05 Dec 2016	Turan type inequalities and bounds for some special functions
Dr. S. Anjana	Indian Statistical Institute, Delhi.	05 Dec 2016	Proportional cause specific reversed hazards model
Dr. Sarita Agrawal	Indian Institute of Technology, Indore.	06 Dec 2016	Geometric Properties of basic Hypergeometric functions.
Dr. Sivaguru Ravisankar	Tata Institute of Fundamental Research	09 Dec 2016	Extension of CR Functions and Codimension Two CR Singular Submanifolds
Prof. Rahul Roy	Indian Statistical Institute, Delhi.	13 Dec 2016	On the Universality of the Non-singularity of General Ginibre and Wigner Random Matrices
Prof. Anirban Chakraborti	School of Computational and Integrative Sciences, Jawaharlal Nehru University, New Delhi	23 Dec 2016	Mesoscopic networks in socio-economic complex systems

Name	Affliation	Date	Title
Dipak K.Dey	Department of Statistics,University of Connecticut,USA	05 Jan 2015	Bayesian Modeling of Sparse High Dimensional Data using Divergence Measures
Hannu Oja	Department of Mathematics and Statistics, University of Turku, Finland	06 Jan 2015	Multivariate Nonparametric Methods based on Spatial Signs and Ranks
Dr. Sounak Chakraborty	Department of Statistics,University of Missouri- Columbia, USA	07 Jan 2015	Bayesian Regularization via Graph Laplacian
Dr. Katsuhiko Sano	Japan Advanced Institute of Science and Technology, Japan	13 Jan 2015	Revising a Labelled Sequent Calculus for Public Announcement Logic
Hannu Oja	Department of Mathematics and Statistics, University of Turku, Finland	20 Jan 2015	Linear Dimension Reduction
Dr. Vivekananda Roy	Department of Statistics, Iowa State University, U. S. A	05 Feb 2015	Spectral analytic comparisons for data augmentation
Dr. Sumit Kumar Pandey	CR Rao AIMSCS, Hyderabad	10 Feb 2015	Signcryption = Achieving Confidentiality and Authentication at the Same Time
Mr. M. Ashok Kumar	Theoretical Statistics and Mathematics Unit, Indian Statistical Institute, Bangalore	18 Feb 2015	Statistical inference based on a parametric family of divergences
Prof. Anandamayee Majumdar	Center for Advanced Statistics and Econometrics, Soochow University, Suzhou.	02 Mar 2015	Bayesian Modeling of Skewed Spatial Distributions
Dr. Sayan Bhattacharya	IMSc, Chennai	04 Mar 2015	Deterministic Fully Dynamic Data Structures for Vertex Cover and Matching.
Prof. Arpad Baricz	Department of Economics,Babe-Bolyai University,Romania	05 Mar 2015	Starlikeness of normalized Bessel functions and their derivatives
Prof. Andrei Tetenov	Gorno-Altaisk University, Russia	06 Mar 2015	Geometry of self-similar continua
Dr. Karthyek R. A. Murthy	Industrial Engineering and Operations Research, Columbia University, U. S. A.	18 Mar 2015	How do you get delayed for long in multi-server queues?
Dr. Ganesh	Department of Statistics, Pondicherry University	13 May 2015	A Mathematical Programming View in solving Multi Criteria Decision Aid problems
Dr. Rajesh Sankaranarayanan	Indian Institute of Technology Madras, Chennai	04 Jun 2015	Fixed point theorems for commuting family of isometry mappings
Dr. Jaikrishnan Janardhanan	Indian Institute of Technology Madras	25 Jun 2015	The Jordan--Schoenflies Theorem and Applications
Mr. Arnab Chakrabarti	Indian Statistical Institute, Chennai Centre	02 Jul 2015	Methods in High dimensional data analysis
Dr. Ashmita Gupta	Indian Statistical Institute, Chennai Centre	09 Jul 2015	The Effect of Trade Liberalization on Gender Inequality: The Case of India
Dr. Dhriti Ranjan Dolai.	Institute of Mathematical Sciences, Chennai.	24 Aug 2015	Spectral Statistics of Random Schrodinger Operators with Unbounded Potentials.
Dr. Nijjwal Karak	University of JyvÃ¤skylÃ¤, Finland	15 Sep 2015	Lebesgue points for Sobolev functions
Dr. Arun Sharma	Indian Institute of Technology Madras	23 Nov 2015	Subordinated Stochastic Processes

Name	Affliation	Date	Title
Dr. Nandini Kannan	University of Texas at San Antonio	22 Jan 2014	Step-stress models with an immune fraction
Dr. Sourish Das	Chennai Mathematical Institute	28 Jan 2014	Some Perspective on Efficient Market Hypothesis and Multiple Testing Problem
Bikas Kumar Sinha	ISI Kolkata	05 Feb 2014	Estimation of the Number of Non-identifiable Species
Bikas Kumar Sinha	ISI Kolkata	10 Feb 2014	Group Testing Designs: A Combinatorial Marvel
Bikas Kumar Sinha	ISI Kolkata	11 Feb 2014	Parameter Estimation In Linear And Quadratic Mixture Models
Arpad Baricz	Babes-Bolyai University Romania	18 Mar 2014	The new-is-better-than-used class of life distributions
Prof. Sitabhra Sinha	Theoretical Physics, IMSc	08 Apr 2014	Econophysics: Towards a physical theory of socio-economic phenomena
Prof. Bimal K. Roy	Director Indian Statistical Institute	10 Apr 2014	Software Reliability from Crowd Sourced Data
Dr. Swadesh Kumar Sahoo	IIT Indore	22 Apr 2014	The hyperbolic and quasihyperbolic metrics associated with certain analytic functions
Dr. Santanu Sarkar	Chennai Mathematical Institute	29 Apr 2014	Cryptanalysis of RSA Variants and Implicit Factorization
Prof. P. Vellaisamy	IIT Bombay	10 Jun 2014	Simpson’s Paradox and Collapsibility Results for Survival Models
Prof. P. Vellaisamy	IIT Bombay	11 Jun 2014	On the construction and the cardinality of finite sigma-fields
Dr. Sivaguru Ravisankar	Oklahoma State University, USA	17 Jun 2014	Tangential Lipschitz Gain I: Warmup including a brief tour of Several Complex Variables
Dr. Sivaguru Ravisankar	Oklahoma State University, USA	19 Jun 2014	Tangential Lipschitz Gain II: Results and Examples
Prof. Pabitra Pal Choudhury	International Statistical Educational Center(ISEC)	23 Jul 2014	New Mathematical Ideas and Applications in Genomics
Prof. Krishna B. Athreya	Iowa State University USA	25 Jul 2014	What is probability theory?
Prof. Saurabh Ghosh	Human Genetics Unit, ISI Kolkata	20 Aug 2014	Population-based Association Mapping Of Quantitative Traits:Stratification Issues And Family-based Alternatives
Mr. Markus Dutschke	University of Augsburg, Germany	21 Aug 2014	CONTINUOUS TIME QUANTUM MONTE-CARLO SOLVER FOR CORRELATED ELECTRONS IN A MAGNETIC FIELD
Mr. Mathew Joseph	University of Trento, Italy	04 Sep 2014	Query Answering over Contextualized RDF/OWL Knowledge with Forall-Existential Bridge Rules Attaining Decidability using Acyclicity
Dr. Mani Lakshminarayanan	Pfizer, Incorporated. USA	05 Sep 2014	Grammar of Graphics: A Visual Data Excursion in R
Mr. G. Kumarapandiyan	Pondicherry University	17 Sep 2014	ESTIMATING THE FINITE POPULATION MEAN AND VARIANCE USING THE KNOWN PARAMETERS OF THE AUXILIARY VARIABLE
Dr. M.Rajesh Kannan	Department of Mathematics, Technion-Israel Institu	30 Oct 2014	Spectral theory of nonnegative tensors
Dr. N. Sreelakshmy	Department of Statistics,M. A. College, Kothamangalam, Kerala.	17 Dec 2014	Role of quantile based reliability concepts in the study of income inequality measures

Name	Affliation	Date	Title
Chris J. Lloyd	Melbourne Business School	07 Jan 2013	Computing highly accurate frequentist confidence limits from discrete data
Gautham Sekar	ISI, Chennai	15 Jan 2013	Statistical Timing Analysis: the Case of the LTE Standard 128-EEA3
Tiru Arthanari	University of Auckland	22 Jan 2013	System Dynamics- Modeling and Applications
P S S N V P Rao	ISI, Chennai	29 Jan 2013	Correlated Bivariate Linear Growth Models: Optimal Designs for Slope Parameter Estimation
Tiru Arthanari	University of Auckland	12 Feb 2013	System Dynamics- Modeling and Applications (part-2)
Ioulia N. Baoulina	ISI, Chennai	19 Feb 2013	On the Chevalley-Warning-Ax-Katz theorem
Jayanta K. Ghosh	former Director of ISI	25 Feb 2013	Current trends in research in Statistics
R.Vishnu Vardhan	Pondicherry University	26 Feb 2013	Statistical Classification Procedures In Diagnostic Medicine
Yoshifusa Ito	Aichi Medical University, Japan	28 Feb 2013	Learning Bayesian and Mahalanobis Discriminants by a Neural Network
P. R. Parthasarathy	IIT Madras	19 Mar 2013	Applied Birth and Death Models
Kameswara Rao Bh	Principal Architect - Research & Innovation, iGATE	26 Mar 2013
Shilpa Ashok Pandit	Psychologist	02 Apr 2013	Using Statistics in Social Science Research: A few reflections
Rudolf Gorenflo	Free University of Berlin, Germany	10 Apr 2013	Subordination in fractional diffusion processes: the analytic approach
Sonam Kumar	CMI	16 Apr 2013	Clustering Genes by Plotting them on a 61-dimensional Vector Space, and Finding the Cluster of a Foreign Gene
Ayon Ganguly	IIT Kanpur	18 Apr 2013	Some Contributions to Step-stress Life Testing
Purbita Jana	University of Calcutta	23 Apr 2013	On categorical relationship between structures and spaces
Lokesh Kumar Rajulapati		07 May 2013	Information, Markets and Mechanism Design
Mr. Arun Kumar Kuchibhotla	B.Stat, ISI Kolkata	03 Jul 2013	Estimating Optimal Transformations for Linear Regression
Dr. Swadesh Kumar Sahoo	IIT Indore	05 Jul 2013	Generalization of uniform domains and quasiconformal mappings
Dr. Debashis Paul	University of California at Davis	20 Aug 2013	Limiting spectral distribution of sample covariance and autocovariance matrices for a class of large dimensional time series
Dr Neelesh S Upadhye	Dept of Mathematics, IIT Madras	26 Aug 2013	Compound Poisson Approximation to Convolutions of Compound Negative Binomial Variables
Bharanedhar S. V.	ISI Chennai	03 Sep 2013	Univalent Harmonic Mappings
Mr. Srikanth Tupurani	IMSc Chennai	17 Sep 2013	Birkhoffs ergodic theorem
Dr. Yanjing Wang	Department of Philosophy, Peking University	24 Sep 2013	Axiomatizations of Dynamic Epistemic Logic
Dr. Ananya Lahiri	Chennai Mathematical Institute	01 Oct 2013	Integrated volatility estimation for "fractional Brownian motion driven stock price model"
Dr. Gautham Sekar	ISI Chennai	08 Oct 2013	Practical (Second) Preimage Attacks on the TCS_SHA-3 Family of Cryptographic Hash Functions
Dr. Sudheesh Kumar Kattumannil	ISI Chennai	22 Oct 2013	A Simple Non-parametric Test for Exponential Against DMTTF Alternatives
Dr. Arpad Baricz	Babes-Bolyai University Cluj-Napoca Romania	06 Nov 2013	The monotone form of l Hospitals rule and geometrically concave distributions
Dr. Arpad Baricz	Babes-Bolyai University Cluj-Napoca Romania	07 Nov 2013	Infinitely divisible distributions, Stieltjes transforms and Turan type inequalities
Dr. G. P. Balakumar	IMSc Chennai	12 Nov 2013	Model domains in C^3 with abelian automorphism group
Dr. Mathew C. Francis	ISI Chennai	26 Nov 2013	Partially Polynomial Kernels for SET COVER and TEST COVER
Dr. Subhadeep De	CSIR-National Physical Laboratory NewDelhi	17 Dec 2013	Atomic Clocks The Frequency Standards in India
Prof. Persi Diaconis	Stanford University	20 Dec 2013	STATISTICAL ANALYSIS OF LARGE NETWORKS
Dr. Sreejith A. V.	TIFR	24 Dec 2013	The Power of Multiplication

Name	Affliation	Date	Title
Iyengar, S.	ISI Chennai	16 Jan 2012	Introduction to network science
Burhanuddin, I.		23 Jan 2012	Some computational problems motivated by the Birch and Swinnerton-Dyer conjecture
Venkateswarlu, A.	ISI Chennai	30 Jan 2012	Introduction to Stream Ciphers
Narasimhan, A.		06 Feb 2012	Exponential Sums and Linear Codes over Finite Fields
Pandu Rangan, C.	ISI Chennai	13 Feb 2012	Lazy Computation
Deshouillers	Universite de Bordeaux, France	24 Feb 2012	Special Lecture on Number Theory.
Muralidhara, V. N.	IIIT Bangalore	12 Mar 2012	The covert set-cover problem with application to Network Discovery.
Ragavendran G.	Caltech	19 Mar 2012	Characterizing Distribution Rules for Cost Sharing Games.
Karandikar, R.	CMI	23 Mar 2012	Is there a science behind opinion polls?
Aravamuthan, S.	Tata Consultancy Services, Chennai	26 Mar 2012	e-Valuate: A Two-player Game on Arithmetic Expressions
Kattumannil, S. K.	ISI, Chennai	02 Apr 2012	Some Results On Generalized Stein's Identity And Its Applications
Purokayasthya, S.	ISI, Kolkata	03 Apr 2012	Convergence of EM algorithm for finding the MLE of parameters of a multivariate t-distribution: result of simulation studies".
Adhikari, R.	IMSC	09 Apr 2012	Statistical properties of languages and scripts.
Roy, B.	ISI, Kolkata	12 Apr 2012	Some Statistical Issues in Coverage and Detection Problems in Large Sensor Networks.
Lodaya, K.	IMSc	16 Apr 2012	Countifiers.
Rao, C. R.		20 Apr 2012	Statistics : The Art, Science and Technology of learning from numbers.
Patankar, V.M.	ISI, Chennai	23 Apr 2012	Ramanujan and Congruences between Modular Forms.
Ghosh, S.	ISI, Chennai	05 Jul 2012	Strategic reasoning in extensive form games: a logical study
Rahaman, R.	IMSc	09 Jul 2012	Local cloning of entangled states
Murty, K. G.	University of Michigan,Ann Arbor	23 Jul 2012	Intelligent Modeling essential to get good results
Sundaram, R.	Northeastern University	10 Aug 2012	Secure and scalable match: overcoming the universal circuit bottleneck using group programs.
Chandrasekaran, P.R.	IIT, Madras	14 Aug 2012	Mathematical thinking and Algorithmic thinking
Samanta, A.	Northeastern University	21 Aug 2012	Symptotics: A Framework for Analyzing the Scalability of Real-World Wireless Networks.
Krishnaswamy, R.	Princeton University	24 Aug 2012	Approximation Techniques for Stochastic Optimization Problems
Ghosh, S.	University of Groningen	24 Aug 2012	Games and logic: an interplay
T. Parthasarathy	ISI, Chennai	19 Nov 2012	Gale-Shapley method in Game theory
Bikas Sinha	ISI	26 Nov 2012	Alice in Diceland
Matthew Bourque	University of Illinois at Chicago	27 Dec 2012	Policy Improvement for Stochastic Games with Additive Rewards & Additive Transitions with Average Payoffs

Name	Affliation	Date	Title
Raghavan.T E S	University of Illinois at Chicago	18 Aug 2011	Game of Hex implies Brouwer's fixed point theorem
Parthasarathy.T.	ISI Chennai	29 Aug 2011	Stochastic Games, Uncountable State Space.
Ramanujam, R.	IMSc.	12 Sep 2011	Regular-infinite games in computer science
Calvert, W.	Southern Illinois University	24 Oct 2011	The Distance Function on a Graph
Rao, B.V.	CMI	14 Nov 2011	Gaussian Concentration Inequality
Rao.P.S.S.N.V.P.	ISI, Kolkata	21 Nov 2011	Godambe's Nonexistence theorem - revisited and refined through matrix arguments
Gujar, S	Xerox Research Lab, Chennai	28 Nov 2011	Redistribution Mechanisms for Assignment of Heterogeneous Objects.