| Introduction | p. 1 |
| Periodic Models | p. 1 |
| Periodicity Induced by Linearization | p. 4 |
| Periodicity Induced by Multirate Sampling | p. 4 |
| Floquet-Lyapunov Theory | p. 8 |
| Floquet-Lyapunov Transformation | p. 9 |
| Characteristic Exponents | p. 12 |
| Stability | p. 15 |
| Lagrange Formula and External Stability | p. 17 |
| Relative Degrees and Zeros | p. 19 |
| Relative Degrees and Normal Form | p. 19 |
| Zeros | p. 23 |
| Periodic Systems in Frequency Domain | p. 26 |
| Time-invariant Representations | p. 30 |
| Sample and Hold | p. 30 |
| Lifting | p. 31 |
| Periodic Control of Time-invariant Systems | p. 32 |
| Output Stabilization of Linear Time-invariant Systems | p. 33 |
| The Chocolate Problem | p. 35 |
| Periodic Optimization | p. 41 |
| Periodic Control of Non-linear Time-invariant Systems | p. 47 |
| Periodic Control of Periodic Systems | p. 47 |
| Stabilization via State-feedback | p. 48 |
| LQ Optimal Control | p. 49 |
| Receding Horizon Periodic Control | p. 51 |
| H∞ Periodic Control | p. 53 |
| Periodic Control of Non-linear Periodic Systems | p. 55 |
| Stochastic Periodic Signals | p. 57 |
| Linear Periodic Systems | p. 61 |
| The Periodic Transfer Operator | p. 61 |
| PARMA Model | p. 65 |
| The Transfer Operator in Frequency Domain | p. 69 |
| State-Space Description | p. 73 |
| Adjoint Operator and Its State-Space Description | p. 79 |
| Bibliographical Notes | p. 80 |
| Floquet Theory and Stability | p. 81 |
| Monodromy Matrix | p. 81 |
| The Characteristic Polynomial of a Monodromy Matrix | p. 82 |
| Invariance of the Characteristic Multipliers | p. 83 |
| The Minimal Polynomial of a Monodromy Matrix | p. 84 |
| Floquet Theory | p. 86 |
| Discrete-time Floquet Theory for the Reversible Case | p. 87 |
| Discrete-time Floquet Theory for the Non-reversible Case | p. 87 |
| Stability | p. 90 |
| Stability and Characteristic Multipliers | p. 90 |
| Time-freezing and Stability | p. 91 |
| The Lyapunov Paradigm | p. 94 |
| Lyapunov Stability Condition | p. 98 |
| Lyapunov Function | p. 100 |
| Robust Stability | p. 100 |
| Quadratic Stability for Norm-bounded Uncertainty | p. 101 |
| Robust and Quadratic Stability for Polytopic Uncertainty | p. 103 |
| Companion Forms | p. 105 |
| Bibliographical Notes | p. 108 |
| Structural Properties | p. 109 |
| Reachability and Controllability | p. 109 |
| Basic Definitions | p. 109 |
| Reachability | p. 110 |
| Reachability Canonical Form | p. 114 |
| Controllability | p. 116 |
| Reachability and Controllability Grammians | p. 119 |
| Modal Characterization of Reachability and Controllability | p. 121 |
| Canonical Controllability Decomposition | p. 123 |
| Observability and Reconstructability | p. 126 |
| Basic Definitions | p. 126 |
| Duality | p. 128 |
| Observability | p. 129 |
| Observability Canonical Form | p. 131 |
| Reconstructability | p. 132 |
| Observability and Reconstructability Grammians | p. 133 |
| Modal Observability and Reconstructability | p. 134 |
| Canonical Reconstructability Decomposition | p. 135 |
| Canonical Decomposition | p. 136 |
| Extended Structural Properties | p. 139 |
| Stabilizability | p. 139 |
| Detectability | p. 141 |
| The Periodic Lyapunov Equation | p. 142 |
| Bibliographical Notes | p. 154 |
| Periodic Transfer Function and BIBO Stability | p. 155 |
| Elementary Algebra of Periodic Polynomials | p. 155 |
| Lifted Periodic Polynomials and Zeroes | p. 157 |
| Weak and Strong Coprimeness | p. 162 |
| Rational Periodic Operators | p. 164 |
| BIBO Stability and Finite Impulse Response | p. 168 |
| Bibliographical Notes | p. 170 |
| Time-invariant Reformulations | p. 171 |
| Sampling in the z-Domain | p. 172 |
| Time-lifted Reformulation | p. 173 |
| Lifting a Time-invariant System | p. 174 |
| Lifting a Periodic System in the Input-Output Framework | p. 175 |
| Lifting a Periodic System in the State-Space Framework | p. 178 |
| Cyclic Reformulation | p. 180 |
| Cycled Signal in the z-Domain | p. 181 |
| Cycling a Time-invariant System | p. 182 |
| Cycling a Periodic System in the Input-Output Framework | p. 183 |
| Cycling a Periodic System in the State-Space Framework | p. 185 |
| The Frequency-lifted Reformulation | p. 187 |
| Frequency-lifting of a Periodic System | p. 188 |
| Frequency-lifting in State-Space: the Fourier Reformulation | p. 189 |
| Bibliographical Notes | p. 192 |
| State-Space Realization | p. 193 |
| Periodic Realization from Lifted Models | p. 195 |
| Minimal, Quasi-minimal, and Uniform Periodic Realizations | p. 195 |
| A Necessary Condition | p. 196 |
| Periodic Realization from Markov Parameters | p. 197 |
| Algorithm for the Derivation of a Minimal Periodic Realization | p. 201 |
| Periodic Realization via Orthogonal Transformations | p. 202 |
| Realization from a Fractional Representation | p. 205 |
| Balanced Realization | p. 210 |
| Bibliographical Notes | p. 212 |
| Zeros, Poles, and the Delay Structure | p. 215 |
| Cyclic Poles and Zeros | p. 215 |
| Lifted Poles and Zeros | p. 218 |
| Zeros via a Geometric Approach | p. 223 |
| Delay Structure and Interactor Matrix | p. 228 |
| Bibliographical Notes | p. 234 |
| Norms of Periodic Systems | p. 235 |
| L2 Norm | p. 235 |
| Lyapunov Equation Interpretation | p. 239 |
| Impulse Response Interpretation | p. 241 |
| Stochastic Interpretation | p. 243 |
| L∞ Norm | p. 244 |
| Input-Output Interpretation | p. 245 |
| Riccati Equation Interpretation | p. 247 |
| Entropy | p. 255 |
| Hankel Norm and Order Reduction | p. 258 |
| Time-domain Specifications | p. 261 |
| Bibliographical Note | p. 264 |
| Factorization and Parametrization | p. 265 |
| Periodic Symplectic Pencil | p. 265 |
| Spectral Factorization | p. 269 |
| From the Spectrum to the Minimal Spectral Factor | p. 270 |
| From a Spectral Factor to the Minimal Spectral Factor | p. 273 |
| J-Spectral Factorization | p. 276 |
| Parametrization of Stabilizing Controllers | p. 278 |
| Polynomial Formulation | p. 278 |
| Rational Formulation | p. 284 |
| Bibliographical Notes | p. 289 |
| Stochastic Periodic Systems | p. 291 |
| Cyclostationary Processes | p. 292 |
| Spectral Representation | p. 295 |
| Spectrum from the Transfer Operator | p. 296 |
| Periodic State-Space Stochastic Models | p. 301 |
| Stochastic Realization | p. 304 |
| Problem Formulation | p. 305 |
| Realization for SISO Periodic Systems | p. 306 |
| Realization from Normalized Data | p. 308 |
| Bibliographical Notes | p. 310 |
| Filtering and Deconvolution | p. 311 |
| Filtering and Deconvolution in the H2 Setting | p. 313 |
| Kalman Filtering | p. 318 |
| A Factorization View | p. 320 |
| Wiener Filtering | p. 322 |
| H2 Prediction | p. 324 |
| A Factorization View | p. 327 |
| H2 Smoothing | p. 329 |
| A Factorization View | p. 332 |
| Filtering and Deconvolution in the H∞ Setting | p. 334 |
| H∞ 1-step Prediction | p. 342 |
| H∞ Smoothing | p. 345 |
| Bibliographical Notes | p. 352 |
| Stabilization and Control | p. 353 |
| The Class of State-feedback Stabilizing Controllers | p. 353 |
| Robust Stabilization | p. 355 |
| Pole Assignment for Control | p. 358 |
| Pole Assignment via Sampled Feedback | p. 358 |
| Pole Assignment via Instantaneous Feedback | p. 360 |
| Exact Model Matching | p. 362 |
| H2 Full-information Optimal Control | p. 368 |
| H2 Optimal State-feedback Control | p. 370 |
| State-feedback H∞ Control | p. 372 |
| Static Output-feedback | p. 375 |
| Sampled-data Approach | p. 375 |
| A Riccati Equation Approach | p. 378 |
| Dynamic Output-feedback | p. 382 |
| Dynamic Polynomial Assignment | p. 382 |
| Dynamic Robust Polynomial Assignment | p. 386 |
| Stabilization with Input Constraints and Uncertain Initial State | p. 390 |
| LQG Control | p. 397 |
| Output-feedback H∞ Control | p. 402 |
| Bibliographical Notes | p. 405 |
| References | p. 407 |
| Index | p. 421 |
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