Pith Number

pith:DRREWCIQ

pith:2008:DRREWCIQ2M72L6LSWVCELXSUKX

not attested not anchored not stored refs pending

Torus actions on small blow ups of CP^2

Liat Kessler

arxiv:0809.1620 v1 · 2008-09-09 · math.SG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DRREWCIQ2M72L6LSWVCELXSUKX}

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	2026-05-18T04:16:32.492471Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1c624b0910d33fa5f972b54445de5455f6025e07f14fc4d0481cf7969b9e09ec

Aliases

arxiv: 0809.1620 · arxiv_version: 0809.1620v1 · doi: 10.48550/arxiv.0809.1620 · pith_short_12: DRREWCIQ2M72 · pith_short_16: DRREWCIQ2M72L6LS · pith_short_8: DRREWCIQ

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/DRREWCIQ2M72L6LSWVCELXSUKX \
  | 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: 1c624b0910d33fa5f972b54445de5455f6025e07f14fc4d0481cf7969b9e09ec

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "d3651e45b11a681fceeab62f2506dd9d9c9919d919900e21f7d4117fe41926d2",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.SG",
    "submitted_at": "2008-09-09T17:53:00Z",
    "title_canon_sha256": "5583442ef711922f83877b05f4f3a7c2a79e9896041b2fe6fba1f064a41fabe7"
  },
  "schema_version": "1.0",
  "source": {
    "id": "0809.1620",
    "kind": "arxiv",
    "version": 1
  }
}