Pith Number

pith:XFCON2AE

pith:2013:XFCON2AENNJ4DSH47YEBWN4VFA

not attested not anchored not stored refs pending

Cabinet of curiosities: the interesting geometry of the angle {\beta} = arccos((3{\phi} - 1)/4)

Fang Fang, Garrett Sadler, Julio Kovacs, Klee Irwin

arxiv:1304.1771 v1 · 2013-04-03 · math.MG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{XFCON2AENNJ4DSH47YEBWN4VFA}

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	2026-05-18T03:28:54.728831Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

b944e6e8046b53c1c8fcfe081b3795281f2d92fa043025c58402163967f9d508

Aliases

arxiv: 1304.1771 · arxiv_version: 1304.1771v1 · doi: 10.48550/arxiv.1304.1771 · pith_short_12: XFCON2AENNJ4 · pith_short_16: XFCON2AENNJ4DSH4 · pith_short_8: XFCON2AE

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/XFCON2AENNJ4DSH47YEBWN4VFA \
  | 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: b944e6e8046b53c1c8fcfe081b3795281f2d92fa043025c58402163967f9d508

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cc196f074e9fcfbcb70b44a85967ab0ac27038f57c2144d34099a960cb6fd41c",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.MG",
    "submitted_at": "2013-04-03T22:51:49Z",
    "title_canon_sha256": "b3e7d9d4a6ef58e6a31e2e524d45846d200445e842a671385b828089dad796f7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1304.1771",
    "kind": "arxiv",
    "version": 1
  }
}