Matrix of ones

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In mathematics, a matrix of ones or all-ones matrix is a matrix where every element is equal to one.[1] Examples of standard notation are given below:

Some sources call the all-ones matrix the unit matrix,[2] but that term may also refer to the identity matrix, a different matrix.


For an n×n matrix of ones J, the following properties hold:


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  2. Weisstein, Eric W., "Unit Matrix", MathWorld.
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