Introduction
Preferred extremals as critical extremals
Construction of preferred extremals
Weak form electricmagnetic duality and its implications
Could a weak form of electricmagnetic duality hold true?
Magnetic confinement, the short range of weak forces, and color confinement
Could Quantum TGD reduce to almost topological QFT?
Some attempts to understand preferred extremals of Kähler action
What "preferred" could mean?
Basic ideas about preferred extremals
What could be the construction recipe for the preferred extremals assuming CP_2= CP_2^{mod
Are Euclidian regions of preferred extremals quaternionKähler manifolds?
Could quaternion analyticity make sense for the preferred extremals?
In what sense TGD could be an integrable theory?
What integrable theories are?
Why TGD could be integrable theory in some sense?
Could TGD be an integrable theory?
Do geometric invariants of preferred extremals define topological invariants of spacetime surface and code for quantum physics?
Preferred extremals of Kähler action as manifolds with constant Ricci scalar whose geometric invariants are topological invariants
Is there a connection between preferred extremals and AdS_4/CFT correspondence?
Generalizing Ricci flow to Maxwell flow for 4geometries and Kähler flow for spacetime surfaces
Could correlation functions, Smatrix, and coupling constant evolution be coded the statistical properties of preferred extremals?
About deformations of known extremals of Kähler action
What might be the common features of the deformations of known extremals
What small deformations of CP_{2} type vacuum extremals could be?
HamiltonJacobi conditions in Minkowskian signature
Deformations of cosmic strings
Deformations of vacuum extremals?
About the interpretation of the generalized conformal algebras
About TGD counterparts of classical field configurations in Maxwell's theory
About differences between Maxwell's ED and TGD
CP_{2} type extremals as ultimate sources of fields and singularities
Delicacies associated with M^{4} Kähler structure
About TGD counterparts for the simplest classical field patterns
Minimal surfaces and TGD
Spacetime surfaces as singular minimal surfaces
Kähler action as Morse function in the space of minimal 4surfaces
Kähler function as Morse function in the space of 3surfaces
Kähler calibrations: an idea before its time?
Appendix: HamiltonJacobi structure
Hermitian and hyperHermitian structures
HamiltonJacobi structure
