Pith Number

pith:HW37INTP

pith:2008:HW37INTPGU27NL2UNNLMEJ7BZ2

not attested not anchored not stored refs pending

The real quadrangle of type E6

Linus Kramer, Ralf K\"ohl, Torsten Kurth

arxiv:0804.3851 v3 · 2008-04-24 · math.GR · math.DG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{HW37INTPGU27NL2UNNLMEJ7BZ2}

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	2026-05-18T02:20:20.300502Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

3db7f4366f3535f6af546b56c227e1ce9cba13b9361a786f834cf6f0e4157442

Aliases

arxiv: 0804.3851 · arxiv_version: 0804.3851v3 · doi: 10.48550/arxiv.0804.3851 · pith_short_12: HW37INTPGU27 · pith_short_16: HW37INTPGU27NL2U · pith_short_8: HW37INTP

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/HW37INTPGU27NL2UNNLMEJ7BZ2 \
  | 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: 3db7f4366f3535f6af546b56c227e1ce9cba13b9361a786f834cf6f0e4157442

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "df4d43b3416e8d8e5113f86803208c0f66c28a3784f08a3b4254ede5b0d06df5",
    "cross_cats_sorted": [
      "math.DG"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2008-04-24T06:53:52Z",
    "title_canon_sha256": "1883d1c7d0fc95edd833dcb1b0f499211aba5be4c92b31dc2f4a78b5f01e2e4c"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0804.3851",
    "kind": "arxiv",
    "version": 3
  }
}