RFC: Expand derivatives in initialization equations before dummy derivative mapping #3211
+1
−1
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This handles cases like
D(-x) ~ 0
which can happen during the fixed point substitutionThe issue though is that if we have
D(y) ~ 0
,y ~ -x
, then we need to substituteD(-x) ~ 0
then change to-D(x) ~ 0
and then substitute, so we need to somehow know to expand in the middle there.