Pith Number

pith:3OUBM5OG

pith:2011:3OUBM5OGGBIKZYN4OTAHDUJEVF

not attested not anchored not stored refs pending

Polygons in billiard orbits

Henk Don

arxiv:1106.2030 v1 · 2011-06-10 · math.NT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3OUBM5OGGBIKZYN4OTAHDUJEVF}

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	2026-05-18T03:11:22.257675Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

dba81675c63050ace1bc74c071d124a948ac0b7db61d2a162e222adc5b914116

Aliases

arxiv: 1106.2030 · arxiv_version: 1106.2030v1 · doi: 10.48550/arxiv.1106.2030 · pith_short_12: 3OUBM5OGGBIK · pith_short_16: 3OUBM5OGGBIKZYN4 · pith_short_8: 3OUBM5OG

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/3OUBM5OGGBIKZYN4OTAHDUJEVF \
  | 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: dba81675c63050ace1bc74c071d124a948ac0b7db61d2a162e222adc5b914116

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "cf9934d7837fbc225dc2f4bb70ea747205ca7fe9492356fa3ce41cdbf02108e7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.NT",
    "submitted_at": "2011-06-10T12:18:32Z",
    "title_canon_sha256": "77f41909a611fdd55e75749a5481f7b702db95a90d83b9e345b5bf7f1499e62d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1106.2030",
    "kind": "arxiv",
    "version": 1
  }
}