Universität Hamburg  Fachbereich
Mathematik  Mathematisches
Seminar  Bereich
Analysis und Differentialgeometrie
email: : riemenschneider@math.unihamburg.de
or
oswald.riemenschneider@unihamburg.de




My full postal address
is the following::
Prof.
(emer.) Dr. Oswald Riemenschneider
Mathematisches Seminar der Universität Hamburg
D20146 Hamburg, Bundesstraße 55
You may try to reach me
via telephone (040) 42838 
5134
However,
I
will not be present in my office regularly. Therefore, it
is more advisable to contact me by email.
The FAX number of my group is (040) 42838  5190
By personal
arrangement via email only (preferred time: prior to the
tea before our Colloquium on Tuesdays).
in particular: complexanalytic
and complexalgebraic geometry and especially
singularities .
In the next few months I shall attach here some partially incomplete chapters
of a quite old singularity project.
Please read more in the
Preface
and then go according to the actualized List of
Contents there to the Chapter you are interested
in:
Chapter
01 , Chapter
02 , Chapter
03 , Chapter
04 , Chapter
05 , Chapter
06 , Chapter
07 , Chapter
08 ,
Chapter
??
[replace in your browser "??" by the chapter
number 01, 02,..., 16, 17, 18, 19],
Supplement
, Citations
.
In a Prospective
Preface you find a tentative list of contents
for the complete text in preparation.
In order to get a satisfactory print out
of 2 pages on one sheet of paper one should use the
option in Adobe
of adding an extra page at the beginning.
See also lectures.
For German reading persons,
there are two other texts:
5. a German
version of 4. (see also text of the 2016
paper)
6. an elementary introduction to group theory and
mathematical puzzles
for highschool students
For information
concerning my teaching (lectures) in the past
see my complete list
of lectures. See
also Vorlesungsverzeichnis of our
Fachbereich.
Manuscripts and exercises for beginners and
more advanced courses (in German):
(All texts are in pdf  format. They are reproduced in the versions of around 2005. More recent versions will be attached from time to time)
Manuscripts for beginners courses :
Analysis 1
Analysis 1 ( Chapters 1  12 )
weekly exercises
Analysis 2
Analysis 2 ( Chapters 13  23.
Version of December 23, 2004 ; Index not yet included )
weekly exercises
Analysis 3
Analysis 3 ( Chapters 24 
37. Version of February 28, 2005 ; Index not yet
included )
Analysis 3a
weekly exercises
Analysis 3b
weekly exercises
Lineare
Algebra und Analytische Geometrie I und II
Lineare
Algebra
und Analytische Geometrie ( Chapters 1  15, Supplement
and Exercises. Version of March 8, 2005 )
New
version
Funktionentheorie
I
Grundzüge
der
Funktionentheorie ( Chapters 1  12
. Version of February 12, 2006 )
Funktionentheorie
II
Funktionentheorie
1 ( Chapters 13  30,
Supplement and Exercises. Version of February 11,
2005 
The Appendix to Chapter 28 and Chapters 29, 30 are still
missing )
Differentialgeometrie I
text (Chapters 1, 2 and 3
only. Version of June 21, 2005)
Differentialgeometrie
II
Differentialgeometrie II
Sorry, there are no hardcopies of my other text
Singularitäten in der reellen und
komplexanalytischen Geometrie
available anymore..
I include
here the pdffiles of a powerpoint presentation of lectures on
1. the
geometry of HirzebruchJung
continued fractions
2. Euler's
elementary analytic evaluations of Zeta(2)
My last lecture before retirement contained
among other topics
3. A power point presentation of
my favourite
citations
4. A dia show of algebraic
surfaces from the homepage
of
Herwig Hauser
1. buying books via
Springer and AMS
2. searching new
mathematical literature via LANL
3. getting information
about music and, in
particular, opera
4. MusikVermittlung
(homepage of my daughter Stephanie Riemenschneider)
If you are interested, you may
find here a biography of Tilman Riemenschneider (more detailed information is
given in the German edition),
his selfportrait and one of his works . Please also contact the
Mainfränkisches Museum in Würzburg. 
My own "creations" in pictorial arts were always rather abstract
culminating
in sketches like
the divisor with normal crossings à la Mirò.
On the cover photo I am playing a piece
of Johann Sebastian Bach at the "Riemenhaus"
in
Here is an older
one showing me (in 1963, when I was a student
in Göttingen) hiking
on the peninsula of Athos.
The next photo was taken (in a similar
style of almost all participants) at the occasion of the
75th birthday of Professor Kneser in Göttingen
in the Auditorium Maximum of the Mathematisches
Institut. It imitades a well known photo of David
Hilbert showing him exactly at the same place
when delivering a lecture with one of his printed papers
in his hand.
On October 29, 2016, there has been a small ceremony
in the same lecture hall in memory of the "Goldenes
Doktorjubiläum" of a few persons.
This and the
next photo were shot after the day
of a typhoon at a famous shrine (Dazaifu) south of Fukuoka
in the 1990's
during one of my several visits to Japan with my wife
Kyoko.
In 2016 we have been in October on Mt.
Rokko, at some waterfalls near Kagoshima
and hiking again in the hills near Fukuoka.
Here are some photos from our last stay from October to
November 2017.
Near Fukuoka, we visited this time the hometown of the
famous Japanese Composer Rentaro
Taki, and I performed his piece
Kojo
no tsuki (moon over the ruined castle) at his statue
on the ruins of Oka
castle.
During a conference in Kagoshima we could marvel again at
the smoking Mt.
Sakurajima and the beginning of
autumnal tints at Lake
Rokukannonmiike.
I attach here
from time to time just a few of my own favourite
personal photos.