Pith Number

pith:Z53XV4EZ

pith:2012:Z53XV4EZ6DKWDYBCCKBBF43NQM

not attested not anchored not stored refs pending

Why We Already Know that Antihydrogen is Almost Certainly NOT Going to Fall "Up"

Scott Menary

arxiv:1207.7358 v2 · 2012-07-30 · physics.gen-ph · gr-qc · hep-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{Z53XV4EZ6DKWDYBCCKBBF43NQM}

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	2026-05-18T03:49:35.641222Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

cf777af099f0d561e022128212f36d8338f4e78593d3eb2b68bb1f5b6b06b92e

Aliases

arxiv: 1207.7358 · arxiv_version: 1207.7358v2 · doi: 10.48550/arxiv.1207.7358 · pith_short_12: Z53XV4EZ6DKW · pith_short_16: Z53XV4EZ6DKWDYBC · pith_short_8: Z53XV4EZ

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/Z53XV4EZ6DKWDYBCCKBBF43NQM \
  | 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: cf777af099f0d561e022128212f36d8338f4e78593d3eb2b68bb1f5b6b06b92e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "096d87fdd8998a19e68fcc3035722ebfc59d02540022410066655027fdf36c74",
    "cross_cats_sorted": [
      "gr-qc",
      "hep-ph"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "physics.gen-ph",
    "submitted_at": "2012-07-30T18:49:40Z",
    "title_canon_sha256": "1be38fa6f045786f2e2287805b3d71bcfc26b27a40260d4e9e7bc0494f0936de"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1207.7358",
    "kind": "arxiv",
    "version": 2
  }
}