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Harold

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3 Questions

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Proof for the funky trace derivative : $d (\operatorname{trace} (ABA'C))$?

linear-algebra matrices multivariable-calculus derivatives
apr 29 '12 at 22:45 leslie townes 3,440
 
3
votes
3
answers
100
views

Why implication ($\phi x \Rightarrow \psi x$) is always true according to Russell?

logic propositional-calculus
jan 23 at 18:30 Git Gud 5,821
 
2
votes
2
answers
122
views

What does Russell mean when he defines the “Posterity… with respect to the immediate predecessor”?

set-theory philosophy natural-numbers
feb 15 at 22:29 Peter Smith 11.6k
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