Online lecture Sites:
 
MSRI , (Mathematical Sciences Research Institute at Berkeley),
ITP (Institute for Theoretical Physics, at UCSB),
Newton Institute , (Issac Newton Institute for Mathematical Sciences),

MSU   (Michigan State Univeristy),
Fields (The Fields Institute at Toronto),
IAS (Institute of Advanced Study),
Yamabe Symposium (Univ. of Minnesota),
String 1998 (ITP, Santa Barbara),
String 1999 (Potsdam)
String 2000 (Univ. of Michigan, Ann Arbor),
String 2002 (Cambridge, UK),
Strings 2001
(Cambridge, UK),

Virtual Seminar Series ,
Melbourne Colloquium ,
KIAS (Korean).


Some interesting talks:
Atiyah (2002), Projective Planes and Spheres,
  -video- lan , -video-dialup, slides
Bryant (1999), Calibrations and exceptional holonomy
(
I[Audio]  , II[Audio]  , III[Audio] )
Donaldson (1997) The Moment Map in Differential Geometry ,( 1 , 2   , 3 )
Lax (2002),   Multiple Eigenvalues , slide
Leung (2001), Mirror Symmetry -video-lan, -video-dialup, slides
Millennium event: A celebration of the Universality of Mathematical thought .






Further Online Geometry Lectures:

Acharta (2001), M-theory, Singular G2-Holonomy Spaces and N=1 Theories in Four Dimensions [ Slides] [Aud ] [Cam]
Acharya (2001) M Theory, G2 Holonomy spaces and N=1 Theories in Four Dimensions,   Lecture notes and G2 Video .

Acharya (2002),   M-theory, G2 manifolds and four-dimensional physics .

Aganagic (2001), D-Branes, Mirror Symmetry, and Counting Holomorphic Disks .
Aganagic (2001), Mirror Symmetry, Disk Instantons and a G 2 Flop [ Slides ] [ Aud ][Cam]
Aganagic (2001) Mirror Symmetry, Disk Instantons and a G2 Flop [Slides] [Aud ] [Cam]

Aspinwall (2001), String Theory and Derived Categories, G2 Video .

Aspinwall (2001), D-Branes on Calabi-Yau Varieties (1 [Slides] [ Aud ] , 2 [Slides] [ Aud ] , 3 [Slides] [ Aud] ,4 [Slides] [ Aud ] )

Anderson (2001), Einstein metrics with prescribed conformal infinity on 4-manifolds .
Atiyah
(2002 ) : Geometry and Physics - From Plato to Hawking

Atiyah (2002) “Twisted K-theory and physics

Atiyah (2002), Polyhedra in Geometry, Physics, and Chemistry,”   -video-lan, -video-dialup, slides  

Atiyah (2002) “A Challenging Problem in Elementary Geometry,”   -video-lan, -video-dialup, slide

Atiyah (2002), “Projective Planes and Spheres,”  -video- lan , -video-dialup, slides

Arinkin (2002 ) : Fourier Transform for Quantized Completely Integrable Systems

Bachas (2002) Branes in AdSspacetimes and holography .
Behrend (2002) : A 2-Categorical Approach to Differential Graded Algebra .
Ben-Zvi (2002), Quantization of Hitchin’s Hamiltonians  

Bertram   (2002): How Many Gromov-Witten Invariants of Rational Curves are There, Really?

Bismut (2001): Equivariant de Rham torsions

Borcherds (2002 ) : Formal Group laws for Infinite-Dimensional Lie Algebras

Bott (1998) Configuration space invariants of knots and 3-manifolds

Bryant (1999), Calibrations and exceptional holonomy ( I[Audio]  , II[Audio]  , III[Audio] )
Bryant (2000), On the Geometry of Differential Equations
Bryant (1999), Basic Systems: The Frobenius and Pfaff- Darboux Theorems
Bryant (1999) Applications 1: Scalar First order PDE and Lie Groups
Bryant (1999) Cartan-Kahler Theory: Integral manifolds and elements
Bryant (1999) Cartan-Kahler Theorem: Statement, ideas in the proof
Bryant (1999) Applications 2: surface theory, self dual 2-forms in 4D
Bryant (1999) Prolongation: Discussion of the Cartan-Kuranishi theorem
Bryant (1999) Applications 3: special geometries and prescribed curvature
Bryant (1999) G-structures: Examples, pseudo-connections, and torsion
Bryant (1999) Applications 4: CR geometry, holonomy, and special metrics
Bryant (1998) Finsler manifolds of constant flag curvature
Bryant (2002):
The Generality of Finsler Metrics of Constant Flag Curvature and some Exotic Holonomy Groups
Cadet (2001) , Deformation and quantization for toric manifolds .
S. S. Chern (1998) Projective Geometry
Tobias Colding (2001): Geodesic laminations on the two-sphere and index bounds

Dijkgraaf (2000): The mathematics of M-Theory
Dijkgraaf (2002): Complex Geometry and String Theory

Dijkgrasf (2002) Matrix models, topological strings and supersymmetric gauge theories .
Dijkgrasf (1999), Matrix theory ( I , II , III )

Donagi (2002) : The Gerbe of Higgs Bundle
Donaldson (1998) Symplectic and Lagrangian surfaces in 4-space
Donaldson (1997)  LefschetzFibrations of Symplectic 4-manifolds
Donaldson (1997) The Moment Map in Differential Geometry,( 1 , 2   , 3 )

Douglas (2001) D-Branes on Calabi-Yau Manifolds .
Douglas (200) "Mastering N=1" .

Dubrovin (1999) Frobenius Manifolds, Isomonodromy Deformations, and Integrable Hierarchies II .

Dubrovin (1999) Frobenius Manifolds, Isomonodromy Deformations, and Integrable Hierarchies .
Dubrovin (2002): Frobenius Manifolds and Integrable Systems  
Dwyer (2002): Lie groups and their classifying spaces
Eastwood (2000), Div, grad and all that .
Edidin(2002)
: Riemann-Roch for Quotients and Todd Classes of SimplicialToric Varieties
Eisenbud (2001): Chow Forms and Resultants - old and new
Faltings (2002): Introduction to Shimura Varieties
Faltings (2002): Line-Bundles on the Moduli-Space of G- Torsors
Faltings (2002): p-adic Hodge Theory, I
Faltings (2002): p-adic Hodge Theory, II
Fefferman (2001):
Poincare metrics for conformal structure - Part I
Fefferman (2001): Poincare metrics for conformal structure - Part II
Freed (2001), Geometry & Topology of p-form Gauge Fields(1 [Slides][Aud ][Cam] ,2 [Slides][Aud ] ,3
[Slides] [Aud] [Cam], 4 [Slides] [ Aud][Cam] )
Freed (2002):
Introduction to Supersymmetry
Freed (1999), Introduction to Supersymmetry .
Frenkel (2002) : Affine Kac-Moody Algebras and Geometric Langlands Correspondence

Fukaya (2001), Asym. Analysis, Multivalued Morse Theory, and a Plan of a Proof of the Mirror Conj [ Slides] [Aud] [Cam

Fulton (2002): What is a Stack?
Gibbons (1999), Supergravity ( I , II ,
III , IV , V) III, IV, V )
III , IV , V)
Gibbons (2002): Geometry, Gravity and M-Theory  

Goldman (2002) : Branched Hyperbolic Structures and Rank 2 Higgs Bundles
Gompf (2000), Symplectic topology .
Gompf (2000) Topological characterizing symplectic manifolds .

Govindarajan (2001) D-branes and Vector Bundles on Calabi-Yau Manifolds: the View from the Helix
Graham (2001), Conformal Geometry, Einstein metrics and scattering .
Graham (2002)
: On Symmetric Degeneracy Loci
Gray (2000), A Hundred Years of the Hilbert Problems
Greene (2001), Aspects of Collapsing Cycles .
Griffiths (2000), Abel's Differential Equations
Griffiths (1998) Neo-modern Hodge theory
Gross (2001), Geometrical Appr to Mirror Symmetry (1
[Slides] [ Aud] [Cam] ,2 [Slides] [ Aud] [Cam] ,3 [Slides] [ Aud] [Cam] ,4 [Slides] [ Aud] [Cam] )
Gukov (2002) The geometry of rational conformal field theories .

Guillemin (2001): The mapping torus of a symplectic mapping
Haiman (2002), : Commutative Algebra of N Points in the Plane ( I , II , III)  
Hain (2002): Iterated Integrals and Motives

Hausel (2002): Intersection Theory on Toric Hyperkahler Varieties
Hausel (2002): Intersection Theory on the Moduli Space of Higgs Bundles
Hawking (2001) AdS, CFT and Cosmology .
Hirzebruch (1998) Why do I like Chern classes?
Hoffman (2001): Background Lecture
Hoffman (2001)
: A Family of Singly Periodic Minimal Surfaces Asymptotic to the Helicoid
Hori (2002): D-branes, Supersymmetry , and Mirror Symmetry
Hori (2001) Mirror Symmetry and its Applications
.
Hori (2001), Derivation of Mirror Symmetry [Aud ] [Cam]

Horja (2001), Derived category automorphisms from mirror symmetry , 

Horowitz (2002) Comments on spacetime singularities .
Huisken (2001): New results on inverse mean curvature flow and the Penrose inequality  
Ilmanen (2001): Embedded Minimal Hypersurfaces with L^2 Curvature Bounds
Iqbal (2002): Del Pezzo Surfaces in String Theory
Joyce (2001): Constructions of Special Lagrangian m-folds in $\C^m$
Joyce (2001): Special LagrangianFibrations and the SYZ Conjecture  
Kapouleas (2001): Constructions of Minimal Surfaces by Gluing Minimal Immersion, I
Kapouleas (2001): Constructions of Minimal Surfaces by Gluing Minimal Immersion, II
Kapouleas (2001)
: Singular Perturbation Constructions for Minimal Surface
Kapranov (2002): Differential Graded Schemes in Algebraic Geometry
Kapranov (2002): A Riemann-Roch Theorem for (Higher) DeterminantalGerbes and Differentiable Manifolds

Katz (1999), Gopakumar-Vafa Invariants of Moduli Spaces of Holomorphic Curves and Integrality
Kirby (1998)   Problem Session
Klebanov (2002) Some stringy aspects of the AdS/CFT duality .
Kostant (2001): The generalized Cayley map from an algebraic group to its Lie algebra
Kresch (2002): Intersection Theory on Artin Stacks: Chow Groups for Artin Stacks
Lawson (1998) Algebraic cycles and the classical groups
Lax (2002),   Multiple Eigenvalues , slide .

Lazarsfeld (2002), An Introduction to Multiplier Ideals,  ( I , II , III )
Leung (2001), Mirror Symmetry -video-lan, -video-dialup, slides

Jun Li (1998) Comparison of algebraic and symplectic Gromov-Witten invariants
Jun Li (2002): Degeneration Formula of Gromov-Witten Invariants
Kefeng Liu (1998) Heat kernel, moment map and moduli space
Kefeng Liu (1998) Mirror Principle
Looijenga (2001), Arrangements and moduli spaces , 

Markman (2002) : Group Valued Higgs Bundles over a Punctured Elliptic Curve
Mazzeo (2001): Surgery on Geometric Structures and Applications

Meeks (2001) : Geometric Results in Classical Minimal Surface Theory, Lecture 1
Meeks (2001): Geometric Results in Classical Minimal Surface Theory, Lecture 2
Meeks (2001): A Survey of Unsolved Problems in Minimal Surface Theory and Approaches for Solving Them
Meeks (2001): Properly Embedded Minimal Surfaces in R^3 of Finite Topology, IV
Meeks (2001): Properly Embedded Minimal Surfaces in R^3 of Finite Topology, V

Melrose (2001) : The eta invariant as a determinant Moore (2001), D-Branes, RR-Fields and K-Theory(1 [Slides][ Aud][Cam] ,2[Slides] [Aud] [Cam],3 [Slides] [ Aud][Cam] ,4[Slides] [Aud] [Cam])

F. Morgan (2001) : Geometric Measure Theory and the Proof of the Double Bubble Conjecture ( 1 , 2 , 3 4 5 6 7 8 9 )

J. Morgan (1999), Bundles on elliptic frbrations. ( 1 , 2 , 3 )
J. Morgan (2002)
: Variations of Hodge Structure Associated to Calabi-Yau Three Folds with h^3=4
J. Morgan (1998) Holomorphic bundles over elliptic curves and families of del Pezzo surfaces
Morrison (1999), Essential Algebraic Geometry ( 1  , 2 )
Morrison (2002) Half K3 surfaces

Morrison (1999) TASI lectures on Duality and Compactification .
Morrison (1999), Canonical singularities. ( 1  ,  2 )
Mukai
(2002): Invariant theory and moduli: from Cayley, Nagata to the Verlinde formula  
Nahm (2002): Exploring a Moduli Space: CFT on K3
Nakajima (2001), Equivar K-Theory of Moduli of Sheaves on ALE(2
[Slides][ Aud] [ Cam] ,3[Slides] [Aud] [Cam ],4 [Slides][ Aud][ Cam] )

Nekrasov (2002) Solution of N=2 gauge theories via instanton counting
Okounkov (2002)
: Gromov-Witten Theory of P^1 - Part II
Ooguri (1999): The AdS/CFT correspondence (I , II )
Ooguri
(2002)
: Strings in AdS_3 and the SL(2,R) WZW Model

Orlov (2002) : Equivalences of Derived Categories of Coherent Sheaves  
Osserman (2001): A Historical Survey of some Aspects of Minimal Surfaces
Ozsvath (2000), The many faces of Floer homology .

Ozsvath (2000),   Holomorphic disks and three-manifolds invariants .
Pandharipande
(2002) : Moduli spaces of curves and combinatorial models
Pandharipande (2002): Moduli spaces of Maps and GW Theory
Pandharipande (2002): Gromov-Witten Theory of P^1 - PartI

Pantev (2002) : Review of Abelian Hodge Theory  
Pantev (2002)
: Non-Abelian Hodge Theory in Degree One  
Pantev (2002)
: Higher Non-Abelian Hodge Theory, I
Pantev (2001) K3 Surfaces, Gerbes and T-Duality [Slides] [Aud ][Cam]
Pope (2002) Special holonomy and the conifold .
Reid (2002): Update on 3-folds
Y.B. Ruan (2002): Cohomology Ring of Crepant Resolutions of Orbifolds
Schoen (2001): Spectral issues in geometric variational problems
Schoen (2001): Mean Curvature in Riemannian Geometry and General Relativity, ( 1  ,  2  ,  3 )
Schoen (2001): Variational Problems in Lagrangian Geometry: Special Lagrangian Submanifolds , Part I
Schoen (2001): Variational Problems in Lagrangian Geometry: Special Lagrangian Submanifolds , Part II
Segal  (1999),  
A Mathematician Looks at Quantum Field Theory ( I , II , III , IV , V )

Segal (1999),   Quantum Field Theory .

Segal (1999), Symplectic manifolds and quantization .
Singer (2000), Hermitian Line Bundles in String Theory and M Theory
Smirnov (2002): Quantization of Affine Jacobian and Duality

Spruck (2001) : Geometric Aspects of the Theory of Fully Nonlinear Elliptic Equations ( 1 2 3 , 4 )
Starr (2002): Quot Schemes for Deligne-Mumford Stacks
Sturmfels (2002): Multigraded Hilbert Schemes
Taubes The Geometry of the Seiberg-Witten Invariants 

Thaddeus (2002) : Higgs Bundle Spaces as Mirror Partners

R. Thomas (2001) Special Lagrangians and FloerHomology [Slides] [Aud] [Cam]

Thurston Are 3-manifolds transparent? Diamonds, glass and surgery

Toledo (2002): Fundamental Group of the Moduli Space of Real and Complex Cubic Surfaces
Topping (2001): Approaching the Willmore Conjecture via Integral Geometry
Vafa (2001), Dualities as Geometric Transitions [Slides] [Aud ][Cam]
Vafa (2002) "Superstrings and topological strings at large N

Vaintrob (2002) : Chiral De Rham Complex
Verdiere (2001): Singular Bohr-Sommerfeld rules

Verlinde (2001), Open/Closed String Duality, Or: How gravity couples to matter .

Verlinde (2001) Some challenges for string theory and holography

Wendland (2002): A Hiker's View of K3: Geometric Aspects of Conformal Field Theory

Wente (2001) : The Plateau and Douglas Problems for Surfaces of Constant Mean Curvature
B. White (2001): Minimal Surfaces and Total Curvature of Curves
B. White (2001): The Classical Plateau Problem
B. White (2001): Flat Chains Over General Coefficient Groups
Witten (2001), M-Theory Dynamics On A Manifold of G2 Holonomy [Slides] [Aud ] [Cam]
Witten (2001),  Overview of K-Theory Applied to Strings
Witten (2001)  "String Theory" Tata Institute
Witten (2001) Quantum Gravity in desitter space .
Wolf (2001): Flat Structures
Wolf (2001): Moduli Spaces of Flat Structures and Period Problems
Wolf (2001): Handle Addition for Minimal Surfaces
Wolfson (2001): Variational Problems in Lagrangian Geometry: Special Lagrangian Submanifolds , Part III
Zelditch (2001)
: The inverse spectral problem for analytic plane domains
Weiping Zhang (2001) : An index theorem for Toeplitz operators on manifolds with boundary
 


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