15.05.87  30.10.89  Postgraduate student,  Dept. of Math. Physics, Leningrad Univ., Russia 
01.12.89  pres.  Scientific Researcher,  St.Petersburg Univ., Russia 
25.10.90  31.12.93  Postdoctoral fellow,  Faculty of Nat. Sci., Stockholm Univ., Sweden 
01.01.94  30.06.94  Associate professor  Dept. of Math., Luleå Univ., Sweden 
01.07.94  30.06.01  Associate professor  Dept. of Math., Luleå Univ., Sweden 
31.10.94  31.10.97  Alexander von Humboldt fellow  Dept. of Math., Bochum Univ., Germany 
01.07.96  30.06.01  Research assistant  Dept. of Math., Stockholm Univ., Sweden 
01.03.01  31.05.01  Alexander von Humboldt fellow  Dept. of Math., Bonn Univ., Germany 
01.09.00  18.12.08  Associate professor  Dept. of Math., Lund Inst. of Tech., Sweden 
18.12.08  pres.  Professor  Dept. of Math., Lund Inst. of Tech., Sweden 
01.07.10  28.02.11  Associate professor  Dept. of Math., Stockholm Univ., Sweden 
01.03.11  pres  Professor  Dept. of Math., Stockholm Univ., Sweden 
15.02.9913.03.99  Guest professor  Dept. of Math., Gakushuin Univ., Tokyo, Japan 
01.04.02  15.04.02  Guest research associate  Dept. of Math., Gakushuin Univ., Tokyo, Japan 
9699, regular visits  Guest professor  Dept. of Math., Bochum Univ., Germany 
0002, regular visits  Guest professor  Dept. of Math., Bonn Univ., Germany 
0712.11.04  Guest professor  Dept. of Math., Univ. of Birminham, UK 
Marlena Nowaczyk,  Licentiate  "Inverse spectral problems for quantum graphs".  ( PDF file)  Dept. of Math., Lund Univ., Sweden, 05.12.05. 

Marlena Nowaczyk,  PhD  "Inverse problems for graph Laplacians".  ( PDF file)  Dept. of Math., Lund Univ., Sweden, 22.01.08. 
Karel Packalen  "On the scattering problem with positon potentials"  Dept. of Math., Stockholm Univ., 


( J.Phys.A, 32 (1999), 12691278 )  Sweden, 15.03.98 
Jonas Larson  "Periodic second order differential operators with  Dept. of Math., Stockholm Univ., 

singular perturbations" ( JMAA, 266 (2002), 127148 )  Sweden, 05.12.00 
Fredrik Stenberg  "Scattering on branching graphs"  Dept. of Math., Stockholm Univ., 

(J.Phys.A, 35 (2002), 101121)  Sweden, 18.12.00 
Anders Nordenfelt  "Spectral Analysis of Discrete Approximations of  Dept. of Math., Lund Univ., 

Quantum Graphs" ( PDF file)  Sweden, 20.04.07 
Erik Wernersson  "Spectral Problems for some Finite and Infinite  Dept. of Math., Lund Univ., 

Quantum Graphs" ( PDF file)  Sweden, 08.02.08 
Maria Astudillo  "PseudoHermitian Laplace operators on stargraphs:  Dept. of Math., Lund Univ., 

real spectrum and selfadjointness" ( PDF file)  Sweden, 12.06.08 
Marcus Wallenberg Symposium in memory of S.Kovalevsky,  Dept. of Mathematics, Stockholm Univ.,  June 1822, 2000, (main organizer). 

Spectral analysis of differential and difference operators  Banach Center, Warszawa, Poland  Regular annual meetings in 19972003 (session organizer). 
Operator
Methods and Applications in Mathematical Physics 
OTAMP2002 Proceedings 
Bedlewo Math. Center, Poland 
May 1318, 2002 (session organizer). 
Operator Methods
and Applications in Mathematical Physics  OTAMP2004
Proceedings 
Bedlewo Math. Center, Poland 
July 612, 2004 (conference organizer). 
Operator Methods and
Applications in Mathematical Physics  OTAMP2006 Proceedings 
Lund Univ., Sweden 
June 1522, 2006 (main organizer). 
Öresund
seminar över Matematisk Analys (Öresund seminar on Mathematical Analysis) 
Lund Univ., Sweden (joined with Copenhagen Univ.) 
November 23, 2007 (coorganizer). 
Operator Methods
and Applications in Mathematical Physics  OTAMP2008
Proceedings 
Bedlewo Math. Center, Poland 
June 1522, 2008 (cochair). 
Integral Geometry
and Tomography  IGT2008 Proceedings 
Stockholm Univ., Sweden 
August 1215, 2008 (cochair). 
Öresund
seminar över Matematisk Analys (Öresund seminar on Mathematical Analysis) 
Lund Univ., Sweden (joined with Copenhagen Univ.) 
June 16, 2009 (coorganizer). 
Spectral Problems and Related Topics 
Moscow Univ., Russia 
November 1821, 2009 (member of the Advisory Board). 
Operator Methods and Applications in Mathematical Physics  OTAMP2010  Bedlewo Math. Center, Poland  August 512, 2010 (cochair). 
Operator Methods and Applications in Mathematical
Physics  OTAMP2012 
Centre de Recerca Matematica, Barcelona, Spain 
June 1114, 2012 (cochair). 
Operator Methods and Applications in Mathematical Physics  OTAMP2014  Stockholm, Sweden 
July 711, 2014 
Major recent presentations: