Pith Number

pith:ECHVRA2Q

pith:2014:ECHVRA2QFAQHCRIMQGSJG3BCBL

not attested not anchored not stored refs pending

Extentability of Automorphisms of Generic Substructures

Aristotelis Panagiotopoulos

arxiv:1404.1427 v2 · 2014-04-05 · math.LO

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{ECHVRA2QFAQHCRIMQGSJG3BCBL}

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	2026-05-18T02:39:23.783157Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

208f588350282071450c81a4936c220ae32e30950900ac9dd401fd2a242ee1ab

Aliases

arxiv: 1404.1427 · arxiv_version: 1404.1427v2 · doi: 10.48550/arxiv.1404.1427 · pith_short_12: ECHVRA2QFAQH · pith_short_16: ECHVRA2QFAQHCRIM · pith_short_8: ECHVRA2Q

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/ECHVRA2QFAQHCRIMQGSJG3BCBL \
  | 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: 208f588350282071450c81a4936c220ae32e30950900ac9dd401fd2a242ee1ab

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9dfaec47b68eb947c37db1001d88116047c7d933c4370092d8f5cbd243d02782",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.LO",
    "submitted_at": "2014-04-05T03:46:10Z",
    "title_canon_sha256": "fac744dc2260f7a6f4b99e993a6cfcaf44553ae31b77663059fb9ac3255773d3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1404.1427",
    "kind": "arxiv",
    "version": 2
  }
}