Preface: why projective? |
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ix | |
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1 | (25) |
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Projective space and projective duality |
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1 | (4) |
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Discrete invariants and configurations |
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5 | (3) |
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Introducing the Schwarzian derivative |
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8 | (5) |
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A further example of differential invariants: projective curvature |
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13 | (5) |
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The Schwarzian derivative as a cocycle of Diff(RP1) |
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18 | (3) |
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Virasoro algebra: the coadjoint representation |
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21 | (5) |
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The geometry of the projective line |
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26 | (21) |
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Invariant differential operators on RP1 |
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26 | (3) |
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Curves in RP1 and linear differential operators |
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29 | (6) |
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Homotopy classes of non-degenerate curves |
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35 | (5) |
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Two differential invariants of curves: projective curvature and cubic form |
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40 | (2) |
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Projectively equivariant symbol calculus |
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42 | (5) |
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The algebra of the projective line and cohomology of Diff(S1) |
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47 | (22) |
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48 | (4) |
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First cohomology of Diff(S1) with coefficients in differential operators |
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52 | (5) |
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Application: geometry of differential operators on RP1 |
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57 | (5) |
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Algebra of tensor densities on S1 |
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62 | (4) |
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Extensions of Vect(S1) by the modules Fλ(S1) |
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66 | (3) |
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Vertices of projective curves |
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69 | (34) |
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Classic four-vertex and six-vertex theorems |
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69 | (7) |
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Ghys' theorem on zeroes of the Schwarzian derivative and geometry of Lorentzian curves |
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76 | (4) |
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Barner's theorem on inflections of projective curves |
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80 | (5) |
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Applications of strictly convex curves |
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85 | (5) |
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Discretization: geometry of polygons, back to configurations |
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90 | (7) |
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Inflections of Legendrian curves and singularities of wave fronts |
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97 | (6) |
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Projective invariants of submanifolds |
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103 | (50) |
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Surfaces in RP3: differential invariants and local geometry |
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104 | (12) |
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Relative, affine and projective differential geometry of hypersurfaces |
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116 | (7) |
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Geometry of relative normals and exact transverse line fields |
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123 | (10) |
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Complete integrability of the geodesic flow on the ellipsoid and of the billiard map inside the ellipsoid |
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133 | (8) |
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141 | (7) |
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Global results on surfaces |
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148 | (5) |
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Projective structures on smooth manifolds |
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153 | (26) |
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Definitions, examples and main properties |
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153 | (6) |
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Projective structures in terms of differential forms |
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159 | (2) |
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Tensor densities and two invariant differential operators |
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161 | (3) |
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Projective structures and tensor densities |
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164 | (5) |
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Moduli space of projective structures in dimension 2, by V. Fock and A. Goncharov |
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169 | (10) |
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Multi-dimensional Schwarzian derivatives and differential operators |
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179 | (35) |
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Multi-dimensional Schwarzian with coefficients in (2, 1)-tensors |
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179 | (6) |
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Projectively equivariant symbol calculus in any dimension |
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185 | (6) |
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Multi-dimensional Schwarzian as a differential operator |
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191 | (3) |
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Application: classification of modules Dλ2(M) for an arbitrary manifold |
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194 | (3) |
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Poisson algebra of tensor densities on a contact manifold |
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197 | (8) |
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Lagrange Schwarzian derivative |
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205 | (9) |
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214 | (22) |
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A.1 Five proofs of the Sturm theorem |
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214 | (3) |
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A.2 The language of symplectic and contact geometry |
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217 | (4) |
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A.3 The language of connections |
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221 | (2) |
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A.4 The language of homological algebra |
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223 | (3) |
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A.5 Remarkable cocycles on groups of diffeomorphisms |
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226 | (3) |
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A.6 The Godbillon--Vey class |
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229 | (3) |
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A.7 The Adler--Gelfand--Dickey bracket and infinite-dimensional Poisson geometry |
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232 | (4) |
References |
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236 | (11) |
Index |
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247 | |