1 Linear Algebraic Aspects 1.1 Linear Symplectic Spaces 1.2 Symplectic Matrices 1.3 Lagrangian Subspaces 1.4 Linear Hamiltonian Systems 1.5 Eigenvalues of Symplectic Matrices 2 ABrief Introduction to Index Functions 2.1 Maslov Type Index i1(γ) 2.2 ω-Index iω(γ) 3 Relative Morse Index 3.1 Relative Index via Galerkin Approximation Sequences 3.2 Relative Morse Index via Orthogonal Projections 3.3 Morse Index via Dual Methods 3.3.1 The Definition of Index Pair in Case 1 and 2 3.3.2 The Definition of Index Pair in Case 3 3.4 Saddle Point Reduction for the General Cases 4 The P-Index Theory 4.1 P-Index Theory 4.2 Relative Index via Saddle Point Reduction Method 4.3 Galerkin Approximation for the (P,ω)-Boundary Problem of Hamiltonian Systems 4.4 (P,ω)-Index Theory from Analytical Point of View 4.5 Bott-Type Formula for the Maslov Type P-Index 4.6 Iteration Theory for P-Index 4.6.1 Splitting Numbers 4.6.2 Abstract Precise Iteration Formulas 4.6.3 Iteration Inequalities 5 The L-Index Theory 5.1 Definition of L-Index 5.1.1 The Properties of the L-Indices 5.1.2 The Relations of iL(γ) and i1(γ) 5.1.3 L-Index for General Symplectic Paths 5.2 The (L,L\\\')-Index Theory 5.3 Understanding the Index iP(γ) in View of the Lagrangian Index iL\\\'L(γ) 5.4 The Relation with the Morse Index in Calculus Variations 5.5 Saddle Point Reduction Formulas 5.6 Galerkin Approximation Formulas for L-Index 5.7 Dual L-Index Theory for Linear Hamiltonian Systems 5.8 The (L,ω)-Index Theory 5.9 The Bott Formulas of L-Index 5.10 Iteration Inequalities of L-Index 5.10.1 Precise Iteration Index Formula 5.10.2 Iteration Inequalicies 6 Maslov Type Index for Lagrangian Paths 6.1 Lagrangian Paths 6.2 Maslov Type Index for a Pair of Lagrangian Paths 6.3 Hormander Index Theory 7 Revisit of Maslov Type Index for Symplectic Paths 7.1 Maslov Type Index for Symplectic Paths 7.2 The ω-Index Function for P-Index 7.3 The Concavity of Symplectic Paths and (ω,L0,L1)-Signature 7.4 The Mixed (,L0,L1)-Concavity 8 Applications of P-Index 8.1 The Existence of P-Solution of Nonlinear Hamiltonian Systems 8.2 The Existence of Periodic Solutions for Delay Differential Equations 8.2.1 M-Boundary Problem of a Hamiltonian System 8.2.2 Delay Differential Systems 8.2.3 Poisson Structure 8.2.4 First Order Delay Hamiltonian Systems 8.2.5 Second Order Delay Hamiltonian Systems 8.2.6 Background and Related Works 8.2.7 Main Results 8.3 The Minimal Period Porblem for P-Symmetric Solutions 9 Applications of L-Index 9.1 The Existence of L-Solutions of Nonlinear Hamiltonian Systems 9.2 The Minimal Period Problem for Brake Solutions 9.3 Brake Subhrdrmonic Solutions of First Order Hamiltonian Systems 10 Multiplicity of Brake Orbits on a Fixed Energy Surface 10.1 Brake Orbits of Nonlinear Hamiltonian Systems 10.1.1 Seifert Conjecture 10.1.2 Some Related Results Since 1948 10.1.3 Some Conseauences of Theorem 1.2 and Further Arguments 10.2 Proofs of Theorems 1.2 and 1.9 11 The Existence and Multiplicity of Solutions of Wave Equations 11.1 Variational Setting and Critical Point Theories 11.1.1 Critical Point Theorems in Case 1 and Case 2 11.1.2 Critical Point Theorems in Case 3 11.2 Applications: The Existence and Multiplicity of Solutions for Wave Equations 11.2.1 One Dimensional Wave Equations 11.2.2 n-Dimensional Wave Equations Bibliography Index
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