Thesis and Guide details:
Details of CSIR Fellowship/ Associateship held, if any or from other sources/ agencies.
Significant foreign assignments:
(a) Significant contributions to science and/ or technology development by the nominee
based on the work done in India during most part of last 5 years:
The work done by the nominee during the 5-year period prior to this year are divided into the following three
1. Algebraic cycles on singular schemes:
Beginning with the time of Chow
and then Grothendieck , the theory of Chow groups of smooth algebraic varieties has been known as the most
powerful cohomology theory for smooth algebraic varieties defined over a field. It is known that most of the
other cohomology theories of such varieties can be realized from their Chow groups.
However, this cohomology theory of algebraic varieties has a serious drawback.
The problem is that the theory of Chow groups FAIL to define a cohomology theory for algebraic varieties,
which have singularities. In complex geometry, these varieties occur as those analytic spaces which do not
form a complex manifold. Such varieties are ubiquitous in algebraic and complex geometry. There has been
several attempts worldwide to define an algebraic cohomology theory for singular varieties. But all attempts
have so far failed.
In one such attempt, Levine and Weibel invented the theory of Chow group of
0-cycles on singular varieties. This Chow group of 0-cycles has since then been extensively studied by
Srinivas, Levine, Weibel and others with remarkable success.
Conjecture of Bloch and Srinivas: Around 1982, Bloch and Srinivas gave a conjectural explicit description
of the Chow group of 0-cycles on a normal surface $X$ in terms of a relative Chow groups of 0-cycles on the
resolution of singularities of $X$. This conjecture was affirmatively solved by Amalendu in collaboration with V.
Srinivas and the solution appears in the reference (1 ). Several outstanding applications of th is solutions were
also obtained in (1 ).
It was already observed long ago that the conjecture of Bloch and Srinivas can be
formulated for singular varieties of any dimension. Amalendu worked on this generalized Bloch-Srinivas
conjecture for few years and wrote (3) and (4). This work culminated in (11 ), where he completely solved the
generalized Bloch-Srinivas conjecture for all varieties with isolated Cohen-Macaulay singularities in
characteristic zero. Building on his work, Matthew Morrow has been able to remove the condition of isolated
singularities in last one year. As a result, Bloch-Srinivas conjecture is now reasonably settled in characteristic
In one of his most recent works, Amalendu has used his solution to the BlochSrinivas
conjecture to give an explicit description of the class field theory of function fields of varieties over a
finite field in terms of the Chow group of 0-cycles on singular schemes . This has led to simple proofs of some
hard results and Moritz Kerz and Shuji Saito for a class of smooth varieties with no restriction on the
characteristic of the ground field. These results solve a conjecture of Deligne in number theory.
Amalendu has also used these results to solve the Bloch-Srinivas conjecture for
projective varieties over finite fields which have isolated singularities.
In another recent work on the subject of K-theory, Amalendu has affirmatively
answered a long term open problem of P. Murthy. This problem asks if the Chow group of 0-cycles on affine
varieties of dimension at least two over an algebraically closed field is torsion free.
(b) Impact of the contributions in the field concerned:
The Bloch-Srinivas conjecture has now been verified in all dimensions in characteristic
zero. This has led to a very good understanding of the theory of 0-cycles on singular varieties. The equivariant
Riemann-Roch theorem has led to the confirmation that the equivariant Chow groups of Edidin-Graham have
expected properties of equivariant motivic cohomology theory. It provides very efficient tools to compute
equivariant K-theory. The algebraic Atiyah-Segal theorem of Amalendu allows a strong tool to compute the
equivariant K-theory of algebraic varieties.
Places where work of last 5 years has been referred/ cited in Books, Reviews:
Names of the industries in which the technology (ies) has (have) been used :
The achievements already been recognised by Awards by any learned body:
The Awardee a fellow of the Indian National Science Academy/Indian Academy of Sciences/National
Academy of Sciences/Others:
The Awardee delivered invited lecture(s) in India/abroad and/or chaired any scientific
Internatiional Conference Symposium:
List of Awardee's 10 most significant publications.
List of Awardee's 5 most significant publications during the last 5 years
List of Awardee's 5 most significant publications from out of work done in India
during the last five years:
Complete list of publications in standard refereed journals:
Complete list of publications with foreign collaborators (indicating your status
List of papers published in Conferences /Symposia/ Seminars, etc:
List of the most outstanding Technical Reports/ Review Articles:
Statement regarding collaboration with scientists abroad:
Total number of patents granted in last five years.
Details of Books published: