Pith Number

pith:AYQGIW3Z

pith:2007:AYQGIW3ZKJ6QGSBQJLDCC5BLNK

not attested not anchored not stored refs pending

Triangulating the Real Projective Plane

Monique Teillaud (INRIA Sophia Antipolis), Mridul Aanjaneya

arxiv:0709.2831 v2 · 2007-09-18 · cs.CG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{AYQGIW3ZKJ6QGSBQJLDCC5BLNK}

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	2026-05-18T04:09:14.482617Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

0620645b79527d0348304ac621742b6aa71e840226aec08d2d830c827a6732a8

Aliases

arxiv: 0709.2831 · arxiv_version: 0709.2831v2 · doi: 10.48550/arxiv.0709.2831 · pith_short_12: AYQGIW3ZKJ6Q · pith_short_16: AYQGIW3ZKJ6QGSBQ · pith_short_8: AYQGIW3Z

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/AYQGIW3ZKJ6QGSBQJLDCC5BLNK \
  | 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: 0620645b79527d0348304ac621742b6aa71e840226aec08d2d830c827a6732a8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "b0bab428dda26178eaaba9e3192eaa859a0d85ffbb1826a5787600499d69eea9",
    "cross_cats_sorted": [],
    "license": "",
    "primary_cat": "cs.CG",
    "submitted_at": "2007-09-18T15:36:38Z",
    "title_canon_sha256": "3f73f24e698f9f93637440352c12e29957c26c921d0c975777a2e9c58cba6565"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0709.2831",
    "kind": "arxiv",
    "version": 2
  }
}