(* How to relate Gamma to funspecs in memory, once we are outside the semax proofs?  We define 'matchfunspecs' which will be satisfied by the initial memory, and preserved under resource_decay / pures_eq / aging. *)

Lemma cond_approx_eq_sym n A P1 P2 :
cond_approx_eq n A P1 P2 ->
cond_approx_eq n A P2 P1.