Pith Number

pith:2ILKFSA5

pith:2012:2ILKFSA56FKY7WFLPTXB3W4UEO

not attested not anchored not stored refs pending

Real projective structures on a real curve

Indranil Biswas, Jacques Hurtubise

arxiv:1202.0162 v1 · 2012-02-01 · math.AG · math.CV

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{2ILKFSA56FKY7WFLPTXB3W4UEO}

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	2026-05-18T04:03:19.990597Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d216a2c81df1558fd8ab7cee1ddb94239e0a1151244b7ab0f9619616a151684d

Aliases

arxiv: 1202.0162 · arxiv_version: 1202.0162v1 · doi: 10.48550/arxiv.1202.0162 · pith_short_12: 2ILKFSA56FKY · pith_short_16: 2ILKFSA56FKY7WFL · pith_short_8: 2ILKFSA5

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/2ILKFSA56FKY7WFLPTXB3W4UEO \
  | 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: d216a2c81df1558fd8ab7cee1ddb94239e0a1151244b7ab0f9619616a151684d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "30eaaacd39469e041e609cfd4ab37b7e9f3d5d337bcafc377cc68145d78b1980",
    "cross_cats_sorted": [
      "math.CV"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2012-02-01T12:47:52Z",
    "title_canon_sha256": "41136aac045427676fd709da9a6135281eab6c26dff5445e47db405d0a0a191d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1202.0162",
    "kind": "arxiv",
    "version": 1
  }
}