Special matrix’s
Definition:
…triangle matrix
R
For example:

Definition:
…diagonal matrix.
Definition:
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For example:
…symmetric matrix. (It is symmetric to it's main counter-diagonal.)
Definition:
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For example:
…asymmetric matrix
Definition
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the transponated matrix from A
We can get a transponated matrix, if we change its rows with its columns.
For example:
, 
Some rules, that comes from the definitions and properties:
D…diagonal matrix
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A… symmetric
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A… asymmetric
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