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Proof step 31 from proof readpage-prepost (previous step)

# buf = VFS_PAGE_SIZE, files[m0] = mkfile(n0, md, # links(m0, dirs), content), n1 < VFS_PAGE_SIZE, F(files -- m0), afs-cons(dirs, files), n ∈ content, m0 ∈ files ⊦ content[n][n1] = getpage(n, content)[n1]

User applied rule insert rewrite lemma

And obtained the following new goals

Proof step 32:
⊦ getpage(n, content) = (n ∈ content ⊃ content[n];zeropage)

Rule argument

spec: afs-stream name: getpage seq: ⊦ getpage(n, content) = (n ∈ content ⊃ content[n];zeropage) subst: [content, n] → [content, n] flags: <all paths>

Additional information

Used terms: content, n