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Proving Lower Triangular Matrices When i > j
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[QUOTE="Ray Vickson, post: 4973988, member: 330118"] I think you have not done "enough" work on your own to satisfy PF requirements. You ask: "if i was to take a 4 x 4 lower triangluar matrix and delete its first row and first column would the 1st,2nd,3rd,4th columns have 0,1,2,3 zeros respecively?" I do not see why you cannot answer this for yourself: just draw a sketch of what a 4 x 4 lower triangular matrix must look like, then remove its first row and column. What does it look like now? Try to generalize this to removing row ##r## and column ##c## from a lower-triangular matrix, where ##r = c##. What does the new matrix look like? Ditto if ##r > c##. [/QUOTE]
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Proving Lower Triangular Matrices When i > j
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