Pith Number

pith:G3SEGKJ4

pith:2008:G3SEGKJ4IBDHTAFDUBUB5S7KOX

not attested not anchored not stored refs pending

On the curvature of biquotients

Martin Kerin

arxiv:0809.4771 v4 · 2008-09-27 · 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{G3SEGKJ4IBDHTAFDUBUB5S7KOX}

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	2026-05-18T04:00:36.558079Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

36e443293c40467980a3a0681ecbea75db7387822da62bd7712f81b12c915ba8

Aliases

arxiv: 0809.4771 · arxiv_version: 0809.4771v4 · doi: 10.48550/arxiv.0809.4771 · pith_short_12: G3SEGKJ4IBDH · pith_short_16: G3SEGKJ4IBDHTAFD · pith_short_8: G3SEGKJ4

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/G3SEGKJ4IBDHTAFDUBUB5S7KOX \
  | 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: 36e443293c40467980a3a0681ecbea75db7387822da62bd7712f81b12c915ba8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "646ff5eeeae1d1cb987fc7a80b7f66c80ad9b4051995024da76ce0fa2c73d3c4",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.DG",
    "submitted_at": "2008-09-27T13:10:03Z",
    "title_canon_sha256": "5ee2177cfdd6c801a386e002b6494adfc907febb0328d4180b234ce5d736b3a8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.4771",
    "kind": "arxiv",
    "version": 4
  }
}