Pith Number

pith:MXCG7BT2

pith:2025:MXCG7BT2K43STXF5BRKQISBCAE

not attested not anchored not stored refs pending

Why Do We Want a Theory of Quantum Gravity?

Karen Crowther

arxiv:2505.04858 v1 · 2025-05-07 · gr-qc · physics.hist-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{MXCG7BT2K43STXF5BRKQISBCAE}

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	2026-07-05T11:00:14.747186Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

65c46f867a573729dcbd0c5504482201153ad8a0635b7e008d3e8ea5092566e0

Aliases

arxiv: 2505.04858 · arxiv_version: 2505.04858v1 · doi: 10.48550/arxiv.2505.04858 · pith_short_12: MXCG7BT2K43S · pith_short_16: MXCG7BT2K43STXF5 · pith_short_8: MXCG7BT2

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/MXCG7BT2K43STXF5BRKQISBCAE \
  | 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: 65c46f867a573729dcbd0c5504482201153ad8a0635b7e008d3e8ea5092566e0

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "4fbc26c6a7ad5736f92f8c556b9ce255a0f62d6e1b55a6e06f3e55bf1cf8fb8c",
    "cross_cats_sorted": [
      "physics.hist-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "gr-qc",
    "submitted_at": "2025-05-07T23:48:42Z",
    "title_canon_sha256": "5d39ba2442e946d2db6431c1d2cffd03bfdf0f4500b6cc98b83a33abf2d2ccac"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2505.04858",
    "kind": "arxiv",
    "version": 1
  }
}