## Horn’s inequality for singular values via exterior algebra

\( \DeclareMathOperator{\tr}{tr} \DeclareMathOperator{\sgn}{sgn} \DeclareMathOperator{\Id}{Id} \)Horn’s inequality states that for any two compact operato...

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# Tag: linear-algebra

## Horn’s inequality for singular values via exterior algebra

\( \DeclareMathOperator{\tr}{tr} \DeclareMathOperator{\sgn}{sgn} \DeclareMathOperator{\Id}{Id} \)Horn’s inequality states that for any two compact operato...

## Strictly positive extensions of linear functionals

information when you need it

There is an interesting exercise in Steven Roman’s book Advanced Linear Algebra: