Pith Number

pith:N7OF33KU

pith:2020:N7OF33KUWC6UNHRF3LBJ5OCY6N

not attested not anchored not stored refs pending

Spinning up a Time Machine

Chris Chang, T.C.Ralph

arxiv:2007.14627 v1 · 2020-07-29 · gr-qc · quant-ph

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{N7OF33KUWC6UNHRF3LBJ5OCY6N}

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	2026-07-05T01:56:43.443717Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

6fdc5ded54b0bd469e25dac29eb858f353469ae93038f345c7a1857a051e7bfd

Aliases

arxiv: 2007.14627 · arxiv_version: 2007.14627v1 · doi: 10.48550/arxiv.2007.14627 · pith_short_12: N7OF33KUWC6U · pith_short_16: N7OF33KUWC6UNHRF · pith_short_8: N7OF33KU

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/N7OF33KUWC6UNHRF3LBJ5OCY6N \
  | 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: 6fdc5ded54b0bd469e25dac29eb858f353469ae93038f345c7a1857a051e7bfd

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "79d1964c59e0111ced9073442a40f322cddd32b53ffac856aee5919e21930835",
    "cross_cats_sorted": [
      "quant-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2020-07-29T06:33:10Z",
    "title_canon_sha256": "4283c6329a9d5c5bd5fd51dde1de08c021c1b7f8922d3ad01cd02d93141cbeec"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2007.14627",
    "kind": "arxiv",
    "version": 1
  }
}