| Introduction | p. 1 |
| Information Retrieval | p. 2 |
| Brief History of Information Retrieval | p. 2 |
| "Definition" of Information Retrieval | p. 7 |
| Retrieval Methods | p. 11 |
| Modern Algebra | p. 13 |
| Equations | p. 13 |
| Solving by Radicals | p. 14 |
| Birth of Modern Algebra | p. 16 |
| Modern Algebra | p. 18 |
| Lattice | p. 19 |
| Importance of Lattices | p. 21 |
| Lattices in Information Retrieval | p. 22 |
| Retrieval Systems | p. 22 |
| Boolean Retrieval | p. 23 |
| Vector Space Retrieval | p. 23 |
| Fuzzy-Algebra-Based Retrieval Methods | p. 24 |
| Probabilistic Retrieval | p. 25 |
| Web Retrieval and Ranking | p. 25 |
| Exercises and Problems | p. 26 |
| Mathematics Basics | p. 27 |
| Elements of Mathematical Logic | p. 28 |
| Proposition | p. 28 |
| Negation | p. 29 |
| Conjunction | p. 29 |
| Disjunction | p. 30 |
| Implication | p. 30 |
| Equivalence | p. 31 |
| Elements of Set Theory | p. 32 |
| Set | p. 32 |
| Subset | p. 33 |
| Equality of Sets | p. 34 |
| Set Union | p. 34 |
| Set Intersection | p. 35 |
| Set Difference | p. 35 |
| Cartesian Product | p. 36 |
| Set Complement | p. 37 |
| Powerset | p. 37 |
| Cardinality of Set | p. 37 |
| Properties of Set Operations | p. 38 |
| Elements of Relations Theory | p. 38 |
| Binary Relations | p. 39 |
| Function | p. 40 |
| Predicate | p. 41 |
| Equivalence Relation | p. 41 |
| Ordering Relation | p. 42 |
| Partially Ordered Set | p. 42 |
| Partition | p. 42 |
| Exercises and Problems | p. 43 |
| Bibliography | p. 44 |
| Elements of Lattice Theory | p. 45 |
| Lattice | p. 46 |
| Lattice and Poset | p. 47 |
| Duality | p. 48 |
| Hasse Diagram | p. 48 |
| Complete, Atomic Lattice | p. 50 |
| Modular Lattice | p. 51 |
| Sublattice | p. 53 |
| Distributive Lattice | p. 53 |
| Complemented, Orthomodular Lattice | p. 56 |
| Boolean Algebra | p. 59 |
| Important Lattices | p. 59 |
| Powerset Lattice | p. 60 |
| Lattice of Logical Propositions | p. 60 |
| Lattice of Logical Predicates | p. 60 |
| Lattice of Logical Implications | p. 61 |
| Lattice Types | p. 61 |
| Exercises and Problems | p. 62 |
| Bibliography | p. 64 |
| Basics of Information Retrieval Technology | p. 65 |
| Documents | p. 66 |
| Power Law | p. 66 |
| Stoplist | p. 71 |
| Stemming | p. 73 |
| Inverted File Structure | p. 74 |
| Term-Document Matrix | p. 76 |
| General Architecture of a Retrieval System | p. 79 |
| Elements of Web Retrieval Technology | p. 80 |
| World Wide Web | p. 80 |
| Major Characteristics of the Web | p. 80 |
| General Architecture of a Web Search Engine | p. 84 |
| General Architecture of a Web Metasearch Engine | p. 86 |
| Measurement of Relevance Effectiveness | p. 87 |
| Relevance | p. 87 |
| Measures | p. 87 |
| Precision-Recall Graph Method | p. 91 |
| Uncertainty of Measurement | p. 93 |
| Measurement of Search Engine Effectiveness | p. 98 |
| M-L-S Method | p. 99 |
| RP Method | p. 102 |
| Exercises and Problems | p. 103 |
| Lattice-Based Retrieval Systems | p. 105 |
| Mooers' Model | p. 106 |
| Lattice of Documents | p. 106 |
| Lattice of Unstructured Queries | p. 106 |
| Lattice of Term Hierarchies | p. 107 |
| Lattice of Boolean Queries and Documents | p. 108 |
| The FaIR System | p. 110 |
| Galois (Concept) Lattice-Based Models | p. 112 |
| Galois (Concept) Lattice | p. 112 |
| Term-Document Matrix and Concept Lattice | p. 113 |
| BR-Explorer System | p. 115 |
| Rajapakse-Denham System | p. 115 |
| The FooCA System | p. 116 |
| Query Refinement, Thesaurus Representation | p. 116 |
| Properties of the Lattices Applied | p. 117 |
| Exercises and Problems | p. 123 |
| Boolean Retrieval | p. 125 |
| Boolean Retrieval Method | p. 126 |
| Technology of Boolean Retrieval | p. 128 |
| Lattice-Based Boolean Retrieval | p. 129 |
| Exercises and Problems | p. 132 |
| Lattices of Subspaces and Projectors | p. 135 |
| Metric Space | p. 136 |
| Complete Metric Space | p. 137 |
| Linear Space | p. 139 |
| Subspace of Linear Space | p. 141 |
| Linear Operator | p. 142 |
| Banach Space | p. 143 |
| Hilbert Space | p. 145 |
| Euclidean Space | p. 146 |
| Projection Theorem | p. 147 |
| Projector | p. 149 |
| Basis of Subspace | p. 151 |
| Lattice of Subspaces | p. 152 |
| Exercises and Problems | p. 153 |
| Bibliography | p. 154 |
| Vector Space Retrieval | p. 157 |
| Introduction | p. 158 |
| Lattices in Vector Space Retrieval | p. 159 |
| Vector Space Retrieval | p. 159 |
| Technology of Vector Space Retrieval | p. 163 |
| Calculation of Meaning Using the Hilbert Lattice | p. 165 |
| Queries with Negation | p. 165 |
| Queries with Disjunction | p. 166 |
| Compatibility of Relevance Assessments | p. 167 |
| Vector Space Retrieval: Lattice-Lattice Mapping | p. 168 |
| Discussion | p. 173 |
| Query Lattice and Free Will | p. 173 |
| Vector Space Retrieval? | p. 173 |
| Vector Space Retrieval and Quantum Mechanics | p. 174 |
| Exercises | p. 177 |
| Fuzzy Algebra-Based Retrieval | p. 179 |
| Elements of Tensor Algebra | p. 180 |
| Similarity Measure and Scalar Product | p. 182 |
| Latent Semantic Indexing Retrieval | p. 186 |
| Eigenvalue, Eigenvector | p. 186 |
| Singular Value Decomposition | p. 188 |
| Latent Semantic Indexing | p. 188 |
| Generalized Vector Space Retrieval | p. 191 |
| Principle of Invariance | p. 192 |
| Elements of Fuzzy Set Theory | p. 193 |
| Fuzzy Set | p. 193 |
| Fuzzy Intersection | p. 195 |
| Fuzzy Union | p. 195 |
| Fuzzy Complement | p. 195 |
| Fuzzy Subset | p. 195 |
| Retrieval Using Linear Space | p. 196 |
| Fuzzy Algebra-Based Retrieval Methods | p. 199 |
| Fuzzy Jordan Measure | p. 200 |
| Fuzzy Entropy Retrieval Method | p. 203 |
| Fuzzy Probability Retrieval Method | p. 204 |
| Experimental Results | p. 206 |
| Discussion | p. 207 |
| More on Measures | p. 207 |
| More on Algebra, Entropy, and Probability | p. 208 |
| Information Retrieval and Integration Theory | p. 209 |
| Principle of Invariance and String Theory | p. 210 |
| Exercises and Problems | p. 212 |
| Probabilistic Retrieval | p. 215 |
| Elements of Probability Theory | p. 216 |
| Principles of Probabilistic Retrieval | p. 218 |
| Probabilistic Retrieval Method | p. 220 |
| Language Model Retrieval Method | p. 224 |
| Lattice Theoretical Framework for Probabilistic Retrieval | p. 226 |
| Bayesian Network Retrieval | p. 231 |
| Exercises | p. 235 |
| Web Retrieval and Ranking | p. 237 |
| Web Graph | p. 238 |
| Link Structure Analysis | p. 246 |
| The PageRank Method | p. 249 |
| The HITS Method | p. 255 |
| Application of the HITS Method in Web Retrieval | p. 257 |
| Latent Semantic Indexing and HITS | p. 259 |
| The SALSA Method | p. 260 |
| The Associative Interaction Method | p. 263 |
| Artificial Neural Networks | p. 263 |
| Associative Interaction Method | p. 266 |
| Application of the Associative Interaction Method in Web Retrieval | p. 270 |
| Combined Methods | p. 270 |
| Similarity Merge | p. 271 |
| Belief Network | p. 272 |
| Inference Network | p. 274 |
| Aggregated Method | p. 274 |
| Lattice-Based View of Web Ranking | p. 282 |
| Web Lattice | p. 282 |
| Chain | p. 283 |
| Ranking | p. 284 |
| Global Ranking | p. 284 |
| Structure-Based Ranking | p. 288 |
| P2P Retrieval | p. 292 |
| P2P Network | p. 292 |
| Information Retrieval | p. 293 |
| Lattice-Based Indexing | p. 296 |
| Exercises and Problems | p. 298 |
| Solutions to Exercises and Problems | p. 301 |
| Reference | p. 307 |
| Index | p. 321 |
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