# Dated notes beside AP10 The Dimension — issued 11 September 2026

**The 420 Code · Studio G · a supersession note; the frozen file is never edited**

AP10 (*The Dimension*, Spacetime, Notebook II) is published at
[the420code.org/AP10_The_Dimension.pdf](/AP10_The_Dimension.pdf), 57 pages,
sha256 `b246e1240b5f3a3f177b39e66c426d007e8a9f89162cfded50b1d05905b01295`.
Two matters of record have arisen from the four papers locked on 11 September 2026.
**None alters the body of the paper, and the paper is not edited.**

> 11 September 2026. Two matters of record, from the four papers locked this day (AP50–AP53). Nothing in the body is altered.
>
> 1. §4 and KS-D.4: the signature’s sign read from R now stands as the causality premise of the standard derivation, with its ground (AP52 §7). KS-D.4: PAID at the structural register; written out at the formal (AP52 Appendix A); LIVE at the formal, narrowed to one identification — the record algebra’s own distance function shown to be the crossing record — which the author has ruled a lemma to be derived in a paper of its own.
>
> 2. §1: the Lorentzian manifold claimed now stands on AP52 §§1–7.
>

## Why these notes are beside the paper and not inside it

No source of record exists for AP10: the closest file differs from the published text, as
`SOURCE_OF_RECORD.md` in this folder shows paragraph by paragraph. Rebuilding the body from the
published PDF would mean re-typesetting a locked paper, and an error introduced that way would be
invisible in a few years' time. So these notes stand beside the published PDF, which is
untouched: its digest holds, and every record that cites it still resolves. When a matching
source is produced, the paper is republished with these notes appended after its body, as AP28's
were on 7 September 2026.

*Frozen files are never edited; corrections supersede, dated, in the open.*