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matrices - smallmatrix with vertical line as column separator, how to do it - TeX - LaTeX Stack Exchange
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math mode - How do I typeset vertical and horizontal lines inside a matrix? - TeX - LaTeX Stack Exchange
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matrices - How to place a vertical dashed line between columns of a matrix? - TeX - LaTeX Stack Exchange
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math mode - How do I typeset vertical and horizontal lines inside a matrix? - TeX - LaTeX Stack Exchange
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matrices - Adding vertical line (equal sign) to augmented bmatrix WITHOUT using array - TeX - LaTeX Stack Exchange
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