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...A matrix operations numerical examples of special types matrices are given by eqs k rectangular is where g has three rows and two columns in eq l if rn row results such algebra as n i column introduction this appendix we provide an to will consider the concepts relevant finite element method adequate background for m square used text definition notation often express algebraic equations x array ofnumbers arranged compact form frequently fornulation then described being order equation illustrates with also simplify solution problem now present some common that be called multiplication scalar elements single have c product fonn cob mae denoted using brackets note addition general nor commutative same can added together summing corresponding ele gb ments subtraction performed similar manner validity b commonly illustrated unlike cannot or subtracted any law applies ixe exj ixj j it number subscript index example let transpose...