Pith Number

pith:VEPY7HAA

pith:2014:VEPY7HAA5QUGUXJQSGCCEFUZMG

not attested not anchored not stored refs pending

Subgroup conjugacy separability for surface groups

Kai-Uwe Bux, Oleg Bogopolski

arxiv:1401.6203 v1 · 2014-01-23 · math.GR

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VEPY7HAA5QUGUXJQSGCCEFUZMG}

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	2026-05-18T03:01:12.899549Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

a91f8f9c00ec286a5d30918422169961b3fac7c53f8ddd842cd5347f68478cdc

Aliases

arxiv: 1401.6203 · arxiv_version: 1401.6203v1 · doi: 10.48550/arxiv.1401.6203 · pith_short_12: VEPY7HAA5QUG · pith_short_16: VEPY7HAA5QUGUXJQ · pith_short_8: VEPY7HAA

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/VEPY7HAA5QUGUXJQSGCCEFUZMG \
  | 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: a91f8f9c00ec286a5d30918422169961b3fac7c53f8ddd842cd5347f68478cdc

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "83bdb99826a641f8596dbf7785a2f3764d24c2302b43a3d1ecbee0c2d698dbf7",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GR",
    "submitted_at": "2014-01-23T22:18:20Z",
    "title_canon_sha256": "140ae687e41b801d867e0c98f0b6aab6c1ec50343cff1ec00dec937c6d2caad3"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1401.6203",
    "kind": "arxiv",
    "version": 1
  }
}