Pith Number

pith:3BNOYX5L

pith:2014:3BNOYX5LG4OO75HPA5Q6ZG7EWB

not attested not anchored not stored refs pending

The group of Cremona transformations generated by linear maps and the standard involution

Isac Hed\'en, J\'er\'emy Blanc

arxiv:1405.2746 v3 · 2014-05-12 · math.AG

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{3BNOYX5LG4OO75HPA5Q6ZG7EWB}

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	2026-05-17T23:54:07.899521Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

d85aec5fab371ceff4ef0761ec9be4b0702fb929e6df7e24a5741a12db519bee

Aliases

arxiv: 1405.2746 · arxiv_version: 1405.2746v3 · doi: 10.48550/arxiv.1405.2746 · pith_short_12: 3BNOYX5LG4OO · pith_short_16: 3BNOYX5LG4OO75HP · pith_short_8: 3BNOYX5L

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/3BNOYX5LG4OO75HPA5Q6ZG7EWB \
  | 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: d85aec5fab371ceff4ef0761ec9be4b0702fb929e6df7e24a5741a12db519bee

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f3b3e04b43d1b70eb80598c5c4a538ca1100cecc31eb05e92bae28820eba475d",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2014-05-12T13:30:42Z",
    "title_canon_sha256": "a52fdae0f2615f5518579b7d49818baf525cc5c26366d088f8c80079699e91c5"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1405.2746",
    "kind": "arxiv",
    "version": 3
  }
}