| fh = mkfh(fid, mode, m), n ∈ ofh[fd, fh] ⊦ ofh[fd, fh][n].fid = fid, fd ∈ ofh, ∃ n0. n0 ∈ ofh ∧ ofh[n0].fid = ofh[fd, fh][n].fid |
n ∈ ofh[fd, mkfh(fid, mode, m)] ⊦ ofh[fd, mkfh(fid, mode, m)][n].fid = fid, fd ∈ ofh, ∃ n0. n0 ∈ ofh ∧ ofh[n0].fid = ofh[fd, mkfh(fid, mode, m)][n].fid