- SHANGHAI LECTURE, "Singularity Theory Conference, East China Normal University", Shanghai, July 10-14, 2017
- REFINMENTS OF TOPOLOGICAL INVARIANTS OF A PAIR topological space and degree one integral homology class, conference on "Finiteness condition in Topology and Algebra", Belfast, August 31-Sept 4, 2015
- REFINMENTS OF HOMOLOGY (homological spectral package), conference "K-theory, C*-algebra and Topology of manifolds", Harbin, China August 24-29, 2015
- Monodromy for a space X and a degree one integral cohomology class, "The eigth international congress of the Romanian mathematicians", Iasi, Romania, June 25-July 1 2015 Iasi
- Refinements of homology (homological spectral package), "The eigth international congress of the Romanian mathematicians", Iasi, Romania, June 25-July 1 2015
- NEW INVARIANTS IN TOPOLOGY, homological spectral package., Bucharest June 17 2015 Math Institute, Bucharest.
- On the Spectral Geometry of closed Riemannian Manifolds in the presence of a smooth function, Real and Complex Differential Geomtry, Bucharest, Sep. 8 - 12, 2014.
- A(computer friendly) alternative to Morse Novikov theory for real and angle valued maps, IPMU, Tokyo, April 2014
- Data Analysis, Persistent homology and Computational Morse-Novikov Theory, Bowling Green Colloquium, November 2013
- Persistence theory revisited, OSU Topology Seminar, September, 2013
- Witten deformation and analytic continuation , Max Plank Institute, Bonn, June 2013
- A NEW (computer friendly) APPROACH TO MORSE-NOVIKOV THEORY, Ostnabruck- April 2013, Eforie June 2013
- The Virtually small spectral package of a closed Riemannian manifold with respect to a Morse function, Mulhouse-Sept 2012, Lausanne-Oct 2012
- Graphs Representations and the Topology of Real and Angle valued maps (an alternative approach to Morse-Novikiov theory) Tianjin, May 2012
- QUIVER REPRESENTATIONS and MORSE-NOVIKOV THEORY (Philadelphia, October 2011)
- DYNAMICS, GEOMETRY AND TOPOLOGY (Goettingen, November 2010)
- DYNAMICS, TOPOLOGY AND SPECTRAL GEOMETRY (Iasi, June 2010)
- SMOOTH STRUCTURE ON THE MODULI SPACE OF THE TRAJECTORIES OF A GENERIC VECTOR

FIELD AND APPLICATIONS (Iasi, September 2009) - DATA AND TOPOLOGY (INVITATION TO PERSISTENCY) (Alba Iulia, September 2009)
- TORSION, A MANIFOLD INVARIANT OF INTEREST IN TOPOLOGY GEOMETRY AND DYNAMICS

(Vienna, November 2008) - TORSION AS A FUNCTION ON THE VARIETY OF REPRESENTATIONS (Bucharest, June 2007)
- A STRANGE GEOMETRIC INVARIANT WITH APPLICATIONS TO TOPOLOGY AND SPECTRAL\

GEOMETRY (Poznan, August 2003) - G-MORSE THEORY REVISITED (Helsinki, August 2003)
- LAPLACE TRANSFORM. FROM TOPOLOGY TO SPECTRAL GEOMETRY (Pitesti, June 2003)
- DIRICHLET SERIES, NOVIKOV THEORY AND SPECTRAL GEOMETRY(Tel Aviv, August 2001)
- WITTEN HELLFER SJOSTRAND THEORY AN ASYMTOTIC EXTENSION OF DeRHAM-HODGE

THEOREM (Zurich, December 1999) - L2-Torsion (Harvard, March 1999)
- WITTEN HELLFER-SJOSTRAND THEORY(Tel Aviv, May 1998)