Compound matrix: Difference between revisions

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Relation to adjugate matrices: I^c and J_c must be exchanged in the definition of the r^th higher adjugate matrix, as well as in the Jacobi's formula
Properties: cite Flanders on Sylvester-Franke thm
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** Normal.
* If {{math|''A''}} is invertible, then so is {{math|''C''<sub>''r''</sub>(''A'')}}, and {{math|1=''C''<sub>''r''</sub>(''A''{{i sup|&minus;1}}) = ''C''<sub>''r''</sub>(''A''){{i sup|&minus;1}}}}.
* (Sylvester–Franke theorem) If {{math|1 &le; ''r'' &le; ''n''}}, then <math>\det C_r(A) = (\det A)^{\binom{n-1}{r-1}}</math>.<ref name="Tornheim1952">{{cite journal|last1=Tornheim|first1=Leonard|title=The Sylvester-FrankeSylvester–Franke Theorem|journal=The American Mathematical Monthly|volume=59|issue=6|year=1952|pages=389|issn=00029890|doi=10.2307/2306811}}</ref><ref>[[Harley Flanders]] (1953) "A Note on the Sylvester-Franke Theorem", [[American Mathematical Monthly]] 60: 543–5, {{mr|id=0057835}}</ref>
 
==Relation to exterior powers==