Pith Number

pith:YIDEBMSO

pith:2012:YIDEBMSO7BA7XTJQ5NJBVVI2KI

not attested not anchored not stored refs pending

Epimorphisms of pseudo-quadratic polar spaces

Koen Struyve, Petra Schwer

arxiv:1210.8356 v1 · 2012-10-31 · math.GR · math.CO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{YIDEBMSO7BA7XTJQ5NJBVVI2KI}

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	2026-05-18T03:41:55.265063Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

c20640b24ef841fbcd30eb521ad51a52214deb45e9e7ef7728d902c68fb69968

Aliases

arxiv: 1210.8356 · arxiv_version: 1210.8356v1 · doi: 10.48550/arxiv.1210.8356 · pith_short_12: YIDEBMSO7BA7 · pith_short_16: YIDEBMSO7BA7XTJQ · pith_short_8: YIDEBMSO

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/YIDEBMSO7BA7XTJQ5NJBVVI2KI \
  | 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: c20640b24ef841fbcd30eb521ad51a52214deb45e9e7ef7728d902c68fb69968

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "2c68567766bb15f0203a7af21bd29231ad63666ff63421e48eee29c7f2e4123d",
    "cross_cats_sorted": [
      "math.CO"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2012-10-31T15:04:20Z",
    "title_canon_sha256": "863a883e26cb6c5ca7f8134f56f3f94e1f34f1779f38964a4ce73a4689758e56"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1210.8356",
    "kind": "arxiv",
    "version": 1
  }
}