Pith Number

pith:7VB5BZ7W

pith:2025:7VB5BZ7WETFIK7TSZQGFMAIZAU

not attested not anchored not stored refs pending

Exploring Fourier methods with beer bottles

David Kordahl, Emma Foster

arxiv:2512.12312 v1 · 2025-12-13 · physics.ed-ph · physics.app-ph · physics.class-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{7VB5BZ7WETFIK7TSZQGFMAIZAU}

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	2026-06-03T00:05:03.452050Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

fd43d0e7f624ca857e72cc0c560119051423f06db49dd79c9911ae0f92aff364

Aliases

arxiv: 2512.12312 · arxiv_version: 2512.12312v1 · doi: 10.48550/arxiv.2512.12312 · pith_short_12: 7VB5BZ7WETFI · pith_short_16: 7VB5BZ7WETFIK7TS · pith_short_8: 7VB5BZ7W

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/7VB5BZ7WETFIK7TSZQGFMAIZAU \
  | 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: fd43d0e7f624ca857e72cc0c560119051423f06db49dd79c9911ae0f92aff364

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "26ef46170379c2e2ee2393f215378aec5b683d5ebb67984a29df245fc8e4ce53",
    "cross_cats_sorted": [
      "physics.app-ph",
      "physics.class-ph"
    ],
    "license": "http://creativecommons.org/licenses/by/4.0/",
    "primary_cat": "physics.ed-ph",
    "submitted_at": "2025-12-13T12:52:59Z",
    "title_canon_sha256": "f7859ca4b8adff614ca4a57835709c392c362e1c577457d9e2c6bb6013aa7343"
  },
  "schema_version": "1.0",
  "source": {
    "id": "2512.12312",
    "kind": "arxiv",
    "version": 1
  }
}