Logo designed by M. Donten-Bury and PP

- is an Algebraic Geometry environment created by Piotr Pragacz (PP)
in 2000 at IM PAN (Institute of Mathematics, Polish Academy of Sciences).
IMPANGA is mainly interested in Complex Algebraic Geometry.

                                                                                                   A goal of IMPANGA is to spread out Algebraic Geometry of good taste among Polish mathematical community.

                                                                                           According to Hartshorne:
"To define algebraic geometry, we could say that it is the study of the solutions of systems
                                                                                            of polynomial equations in an affine or projective n-space. In other words, it is the study of algebraic varieties.

We organize bi-weekly IMPANGA Seminar, which usually takes place at IM PAN in Warsaw
(the word "seminar" is in Latin or Polish "seminarium", and means in Polish "szkolka roslin", i.e., "a school of plants" in English).

From time to time, we work by research groups.

We also organize workshops and conferences.

    We publish IMPANGA Lecture Notes and other books.


Dates of Impanga in 2019

11, 25 Oct

8, 22 Nov

6, 20 Dec


Impanga 393 on October 11 will be:
Achinger / Vlasenko


Impanga 394 on October 25, 2019  will be devoted to

Alain Lascoux (1944-2013)

and his mathematics. The speakers will be:
Letterio Gatto / PP

A speaker for Impanga 395 will be M. Dołęga.


We shall also have two Impanga Junior Seminars
in November and December with A. Joucis and
M. Lara as speakers. (They are postdocts working
with P. Achinger.)


Dear All,

This is a preliminary announcement of the conference

                        IMPANGA 20.

Time: June 21, 2020 - June 27, 2020

Venue: Banach International Mathematical Center, Będlewo

This will be the third IMPANGA conference after those
in 2010 and 2015.

Organizing Committee: Christophe Eyral, Grzegorz Kapustka,
Michal Kapustka, Piotr Pokora, Piotr Pragacz and Halszka

Scientific Committee: Dave Anderson, Sara Billey, Izzet Coskun,
Laurent Manivel, Alexander Yong.

We shall have several invited lectures and some contributed talks.

The main goal of the conference is to discuss a recent progress
on SCHUBERT VARIETIES, their appearances in algebraic geometry,
representation theory, combinatorics and  mathematical physics.

We hope for a standard funding of the Banach Center conferences
which will cover, however, only a part of the costs. We shall apply

 for money to several sources.

In 2019 the web page of the conference will be posted
with a registration page, and with a description of
the scientific content of the event.

See you at our conference,
The organizers

(dated  16.01.2019)


Department of Algebra and Algebraic Geometry of IM PAN in 2018/19:

Piotr Achinger, Aleksandra Borówka, Jarosław Buczyński, Maciej Dołęga,
Boulous El Hilany, Christophe Eyral, Joachim Jelisiejew, Michał Kapustka,
Grzegorz Malara, Mateusz Michałek (on leave), Karol Palka, Tomasz Pełka,
Piotr Pokora, PP, Filip Rupniewski,  Masha Vlasenko.


Here you can find information about our IMPANGA seminar in past (attention: some links expired):

For information about the IMPANGA schools, research groups, sessions and summer seminars,
click here:

IMPANGA schools ...

The two largest events organized by IMPANGA so far were:

IMPANGA Summer School on Algebraic Geometry (2010)
A piano concert for the participants of the School was performed by Pawel Wakarecy in the Kornik castle.
Pawel Wakarecy plays Chopin


Conference on Algebraic Geometry IMPANGA 15 (2015)

The conference hosted 
Session "Pragacz 60"
Fulton's  letter

A piano concert for the participants of the Conference was performed by Maria Wojcik at Dzialynski Palace in Poznan.
Maria Wojcik plays Chopin

There was also a satellite workshop  Projective geometry and syzygies 


The lecture notes from the conference, schools and seminars of IMPANGA form the following Trilogy:




See also a publication about Hoene-Wronski:


English abstracts

Here is a recent IMPANGA publication dedicated to the memory of Friedrich Hirzebruch:


(J. Buczyński, M. Michałek and E. Postinghel, editors)

Here you can download the preliminary versions of the articles in the above volumes:   

Lecture notes of IMPANGA 2002-04

Lecture notes of IMPANGA 2005-07

Lecture notes of IMPANGA 2007

Lecture notes of IMPANGA 2010-11

Here you can find pictures from IMPANGA lectures by Izzet Coskun (December 2013):

The geometry of homogeneous varieties

Here you can find pictures from IMPANGA lectures by Valentina Kiritchenko (April 2014):

Divided differences,..., Bott-Samelson resolutions

Here you can find three related articles, which  discuss what IMPANGA did
(2nd article stems from Wiad. Mat. 2011 and the 3rd one from
IMPAN 2015)


Friedrich Hirzebruch (1927-2012)   was the first foreign speaker at the IMPANGA Seminar and
a good friend to IMPANGA. The attached text appeared in the Proceedings of IMPANGA15


Alexander Grothendieck (1928 - 2014)

Alexander Grothendieck  passed away on November 13 in the hospital of Saint-Girons (French
Department Ariège) not far from Lasserre, the village where he lived from the early 1990's .

Grothendieck was an extremally important inspiration for us in IMPANGA. In 2004, we dedicated to
him a session
at IM PAN :

Hommage a Grothendieck

with participation of many algebraic geometers, topologists and number theorists.
The first volume of the Impanga Lecture Notes "Topics in cohomological studies of algebraic varieties"
(Birkhauser 2005) was dedicated to Grothendieck. You can download the introductory article
"Notes on life
and work of Alexander Grothendieck" (or its Polish version from Wiad. Mat. 40)  from
my web page. An ameliorated English version appeared in
American Mathematical Monthly 13(9) 2006.



Kinosaki in 2014

Since 40 years Japanese algebraic geometers organize symposia at Kinosaki Onsen (2.5 hour by train
from Kyoto).
The first Kinosaki symposia were organized by T. Miyata and M. Nagata, and S. Mori
(very young at that time) was one of the first speakers. In 2014, the symposium took place on 20-24 October
and was organized by K. Oguiso, H. Ohashi and K. Mitsui. Among the speakers were: K. Yoshioka, B. Fu,
 K. Kawatami, M. Wandel, K. Hashimoto, M. Chen, J. Chen,  Ch. Liedtke, Y. Matsumoto, A. Ito, K. Ueda,
A. Bondal and others. The sessions were chaired by: S. Mukai, S. Mori, Y. Kawamata, T. Saito, K. Saito
 and others. The history of Kinosaki symposia was recalled by T. Oda, M. Miyanishi and T.  Shioda. 

After lectures and onsen (Japanese bath), the participants meet in the hall of  the ryokan Tsutaya Inn
(a Japanese-type hotel with tatami) and discuss various matters with sake
until midnight.
Very fruitful discussions indeed...



Alain Lascoux (1944-2013)   was a good friend to IMPANGA. The attached text is a
memorial writing  for Adv. Stud. Pure Math. 71 "Schubert Calculus - Osaka 2012".




In Brasil, in Rio de Janeiro, there is a research institute in maths called IMPA (please note that this name is close to IMPANGA ;-) )
They started around 1952. IMPA has a large building (it contains 3 auditoria , several convenient lecture rooms and many
offices for working mathematicians). This year, in April, May and June, IMPA hosted a trimester on algebraic geometry. Algebraic
geometry is not a leading domain at IMPA (this role is played by dynamical systems with A. Avila - a 2014 Fields medalist) ,
but the direction of IMPA understands a leading role of algebraic geometry in contemporary mathematics. Consult the web page:

Trimester of Algebraic Geometry


E.g.  the lecturers of this first week of June included: O. Debarre, R. Lazarsfeld and B. Totaro.
PP participated there at two conferences in the 2nd half of May: "Higher dimensional algebraic geometry"
and "Rational points", and also at the "Algebra Seminar" directed by Eduardo Esteves, who was the main
organizer of the trimester.

If you will have an occasion to visit IMPA - do it without hesitation (also coffee there is super!). Near IMPA
there is "Jardim Botanico", an ideal place for meditations and work on maths.




Jerzy Browkin (1934-2015)

When I was a student at Warsaw University (1975-76), Jerzy Browkin teached
me the theory of elliptic curves. He also introduced me to Milnor's K-theory.
Jerzy Browkin was often a guest at the IMPANGA seminar, and especially when
we worked on some arithmetic subject. In 2007, he gave a beautiful lecture on
zeros of the Riemann zeta function. This lecture is written and available (see above
in "Lectures notes of IMPANGA 2007"). His mathematical fatherland was
the arithmetic geometry enviroment in Moscow: Shafarevich, Manin, Parshin
"who was able to present in a few sentences a several pages long proof"...
He also evaluated highly Tate, about whom he reported: "there is such
a mathematician who publishes rarely but is often invited with a lecture
to ICM Congresses."



Mariusz Koras (1951 - 2017)

I met Mariusz in 1975 when I was a student at Warsaw University whose
department of mathematics was situated at two floors of the Palace of
Mariusz superwised the exercises to Jerzy Browkin's lectures
on elliptic curves.
In fact, he did all the work, reading with us several
 papers and completing all the details.
I came from Torun and was a
beginner in algebraic geometry, so I liked his style that helped me smoothly
enter the topic. We also knew at that time that Mariusz was a leading
Polish climber, and that he did with Jan Wolf great things on
. Later, Mariusz jointed IMPANGA in 2001-02.
He helped  me greatly with the IMPANGA seminar during
this time, so I was able to go to Paris to work with Alain Lascoux.
Later he coorganized with Karol Palka an IMPANGA school on
affine geometry (Banach Center in Warsaw, June 12-14, 2012).
We hoped so much to have him at IMPANGA for the academic year
2017/18  but unfortunately this is not possible . . .




Here are two quota from ICM 2018, which I find important:

“I am very grateful to CNRS. Langlands program is far from my
first mathematical subject and I would never have been able to devote
myself to it without the great freedom given by CNRS to researchers
to accomplish their work” said Vincent Lafforgue in his acknowledgements.

What Masaki Kashiwara said in his interwiev during
ICM in Rio is worth repeating:
"You have to forget important things to learn new things."



See you at Impanga!