Pith Number

pith:QPXUSRT6

pith:2009:QPXUSRT6NW4DUMCB3NART5UWSM

not attested not anchored not stored refs pending

Time and Spacetime: The Crystallizing Block Universe

George F. R. Ellis, Tony Rothman

arxiv:0912.0808 v1 · 2009-12-04 · quant-ph · gr-qc

Open paper page JSON Open Graph Bundle Merged state Verified badge What is a Pith Number?

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{QPXUSRT6NW4DUMCB3NART5UWSM}

Prints a linked badge after your title and injects PDF metadata. Compiles on arXiv. Learn more · Embed verified badge

Record completeness

1 Bitcoin timestamp

2 Internet Archive

3 Author claim open · sign in to claim

4 Citations open

5 Replications open

✓ Portable graph bundle live · download bundle · merged state

The bundle contains the canonical record plus signed events. A mirror can host it anywhere and recompute the same current state with the deterministic merge algorithm.

Receipt and verification

First computed	2026-05-18T04:26:45.792409Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

83ef49467e6db83a3041db4119f696930ccbc6ef7844e0e7174e6e95f05ab847

Aliases

arxiv: 0912.0808 · arxiv_version: 0912.0808v1 · doi: 10.48550/arxiv.0912.0808 · pith_short_12: QPXUSRT6NW4D · pith_short_16: QPXUSRT6NW4DUMCB · pith_short_8: QPXUSRT6

Agent API

Resolver JSON Graph JSON Events JSON Schema Signing key

Verify this Pith Number yourself

curl -sH 'Accept: application/ld+json' https://pith.science/pith/QPXUSRT6NW4DUMCB3NART5UWSM \
  | jq -c '.canonical_record' \
  | python3 -c "import sys,json,hashlib; b=json.dumps(json.loads(sys.stdin.read()), sort_keys=True, separators=(',',':'), ensure_ascii=False).encode(); print(hashlib.sha256(b).hexdigest())"
# expect: 83ef49467e6db83a3041db4119f696930ccbc6ef7844e0e7174e6e95f05ab847

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d7f2dc11b5f75818ff8e5a81e9460a9abab7100c866e41315fac48ff60b8e72b",
    "cross_cats_sorted": [
      "gr-qc"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "quant-ph",
    "submitted_at": "2009-12-04T10:10:37Z",
    "title_canon_sha256": "12ca149ad0889cef2c764b0966d6a5dd63d001d26b17be40a7cfc21f41da067c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0912.0808",
    "kind": "arxiv",
    "version": 1
  }
}