Pith Number

pith:URQUO4LG

pith:2016:URQUO4LGBTCU52YG7XAF2GPSGM

not attested not anchored not stored refs pending

On homomorphisms between Cremona groups

Christian Urech

arxiv:1603.03294 v1 · 2016-03-10 · 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{URQUO4LGBTCU52YG7XAF2GPSGM}

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	2026-05-18T01:19:16.659062Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a4614771660cc54eeb06fdc05d19f2333d393e4153c23c49f22bce81c09793be

Aliases

arxiv: 1603.03294 · arxiv_version: 1603.03294v1 · doi: 10.48550/arxiv.1603.03294 · pith_short_12: URQUO4LGBTCU · pith_short_16: URQUO4LGBTCU52YG · pith_short_8: URQUO4LG

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/URQUO4LGBTCU52YG7XAF2GPSGM \
  | 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: a4614771660cc54eeb06fdc05d19f2333d393e4153c23c49f22bce81c09793be

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "25fd6695889eccebf729975eca8ebcad464da002727f6d60165733dc12f827f1",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AG",
    "submitted_at": "2016-03-10T15:09:03Z",
    "title_canon_sha256": "d5f0eef99052b86414dfc8976adadadbc8bfe482514651302bc19b5f6fe2199a"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1603.03294",
    "kind": "arxiv",
    "version": 1
  }
}