Has anyone described 'unfolding' as used in mathematical physics (e.g. on-shell AND off-shell) as analogous to a resolution in algebra - higher derivatives are unfolded in terms of new variables?
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1$\begingroup$ Hi Jim, do you have a reference where this term is used and applied? Is it a vague general procedure or is it reasonably well defined (for mathematical physics, that is)? $\endgroup$– David Roberts ♦Commented Jun 15, 2012 at 22:45
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$\begingroup$ I believe he is referring the the procedure by which you expand a higher-order differential equation as a first order equation in more variables, by introducing new variables like "$k$th derivative of $x$". $\endgroup$– S. Carnahan ♦Commented Jun 16, 2012 at 10:56
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$\begingroup$ I've always associated that with blowups. $\endgroup$– Mariano Suárez-ÁlvarezCommented Apr 23, 2015 at 2:42
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