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→Description
*The main diagonal of a matrix consists of those elements that lie on the diagonal that runs from top left to bottom right.
*The main diagonal of a matrix consists of those elements that lie on the diagonal that runs from top left to bottom right.
*Main diagonal is also called principal diagonal, primary diagonal, leading diagonal, or major diagonal.
*Main diagonal is also called principal diagonal, primary diagonal, leading diagonal, or major diagonal.
*So main diagonal of a matrix A is defined by A is the collection of entries <math>A_{i,j}</math>,where i=j.
*So main diagonal of a matrix A is defined by A is the collection of entries <math>a_{i,j}</math>,where i=j.
*Diagonal entries are <math>A_{1,1},A_{2,2},A_{3,3}</math> and so on.
*Diagonal entries are <math>a_{11},a_{22},a_{33}</math> and so on.
==Examples==
==Examples==