Pith Number

pith:56UUQQ3N

pith:2025:56UUQQ3NBKU2KIMVS5JIBRRHNF

not attested not anchored not stored refs pending

Phone physics and the Gateway Arch: Fun with friends and physics at the AAPT Winter Meeting in St. Louis

Bree Barnett Dreyfuss, David Marasco

arxiv:2506.22746 v1 · 2025-06-28 · physics.ed-ph · physics.pop-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{56UUQQ3NBKU2KIMVS5JIBRRHNF}

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	2026-07-05T11:28:44.575900Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

efa948436d0aa9a52195975280c627697b737786b144917343e22e5d54b500f2

Aliases

arxiv: 2506.22746 · arxiv_version: 2506.22746v1 · doi: 10.48550/arxiv.2506.22746 · pith_short_12: 56UUQQ3NBKU2 · pith_short_16: 56UUQQ3NBKU2KIMV · pith_short_8: 56UUQQ3N

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/56UUQQ3NBKU2KIMVS5JIBRRHNF \
  | 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: efa948436d0aa9a52195975280c627697b737786b144917343e22e5d54b500f2

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b57873bb7148c7b092b79c85c854ae25ff3aaabd39b395210a7d14be9444c18a",
    "cross_cats_sorted": [
      "physics.pop-ph"
    ],
    "license": "http://creativecommons.org/licenses/by-nc-sa/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2025-06-28T03:57:28Z",
    "title_canon_sha256": "25960230f37487f144dba907ca300de941a077e0e114887a7a9847205290607e"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2506.22746",
    "kind": "arxiv",
    "version": 1
  }
}