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082-Engineering-Mathematics-Anthony-Croft-Robert-Davison-Martin-Hargreaves-James-Flint-Edisi-5-2017

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8 Matrixalgebra

Contents 8.1 Introduction 257

8.2 Basicdefinitions 258

8.3 Addition,subtractionandmultiplication 259

8.4 Usingmatricesinthetranslationandrotationofvectors 267

8.5 Somespecialmatrices 271

8.6 Theinverseofa2×2matrix 274

8.7 Determinants 278

8.8 Theinverseofa3×3matrix 281

8.9 Applicationtothesolutionofsimultaneousequations 283

8.10 Gaussianelimination 286

8.11 Eigenvaluesandeigenvectors 294

8.12 Analysisofelectricalnetworks 307

8.13 Iterativetechniquesforthesolutionofsimultaneousequations 312

8.14 Computersolutionsofmatrixproblems 319

Reviewexercises8 321

8.1 INTRODUCTION

Matrices provide a means of storing large quantities of information in such a way that

each piece can be easily identified and manipulated. They permit the solution of large

systemsoflinearequationstobecarriedoutinalogicalandformalwaysothatcomputer

implementation follows naturally. Applications of matrices extend over many areas of

engineering including electrical network analysis and robotics.

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