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International Journal of…2
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Elzaidi, S. M.1
Koeber, Martin1
Schafer, Uwe1
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On the Magic Square and Inverse
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Elzaidi, S. M. – International Journal of Mathematical Education in Science & Technology, 2005
In this note, we give a method for finding the inverse of a three by three magic square matrix without using the usual methods for finding the inverse of a matrix. Also we give a method for finding the inverse of a three by three magic square matrix whose entries are also matrices. By using these ideas, we can construct large matrices whose…
Descriptors: Mathematical Concepts, Matrices, Mathematics Education, Mathematical Logic
The Unique Square Root of a Positive Semidefinite Matrix
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Koeber, Martin; Schafer, Uwe – International Journal of Mathematical Education in Science & Technology, 2006
An easy way to present the uniqueness of the square root of a positive semidefinite matrix is given.
Descriptors: Transformations (Mathematics), Matrices, Mathematical Logic, Equations (Mathematics)