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Proof step 18 from proof pushx-cut-seq (previous step)

inv(ixs, # x) ⊦ pushx(# x, ixs, x + a ' + x0) = pushx(# x, ixs, x + a ')

User applied rule structural induction

And closed the goal!

Rule argument

indvar:ixs

Additional information

[Concretesimprules((Csimpnamedseq(pushx-base,,, ⊦ pushx(n, [], x) = (n + []) + []) Csimpgen(illist freely generated by [], +;) Csimpnamedseq(list,indexseq,c, ⊦ n + ix = n ' + ix) Csimpnamedseq(list,indexseq,app, ⊦ ix + [] = ix) Csimpnamedseq(list,indexseq,a, ⊦ (ix + ix0) + ix1 = ix + ix0 + ix1) Csimpnamedseq(list,indexseq-stackseq,c, ⊦ ix + ixs = ix ' + ixs) Csimpnamedseq(list,indexseq-stackseq,app, ⊦ ixs + [] = ixs) Csimpnamedseq(list,indexseq-stackseq,a, ⊦ (ixs + ixs0) + ixs1 = ixs + ixs0 + ixs1) Csimpnamedseq(list,indexseq-stackseq,c-04, ⊦ ix ' = ix0 ' ↔ ix = ix0)))]