Pith Number

pith:VQTZKV47

pith:2015:VQTZKV4736BC45E5OVBTFFBALX

not attested not anchored not stored refs pending

Compacta with shapes of finite complexes: a direct approach to the Edwards-Geoghegan-Wall obstruction

Craig R. Guilbault

arxiv:1509.00921 v1 · 2015-09-03 · math.GT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{VQTZKV4736BC45E5OVBTFFBALX}

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	2026-05-18T01:34:04.772916Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

ac2795579fdf822e749d75433294205dea42a315fa487aa0656d78cd767036c8

Aliases

arxiv: 1509.00921 · arxiv_version: 1509.00921v1 · doi: 10.48550/arxiv.1509.00921 · pith_short_12: VQTZKV4736BC · pith_short_16: VQTZKV4736BC45E5 · pith_short_8: VQTZKV47

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/VQTZKV4736BC45E5OVBTFFBALX \
  | 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: ac2795579fdf822e749d75433294205dea42a315fa487aa0656d78cd767036c8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "7c8707bcfd9d5e636f7f940fe1a9589b6290f1cf8387d4f4f8d611a839d57fa3",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2015-09-03T02:33:40Z",
    "title_canon_sha256": "e11c80160e5891c82cd47b3654b6642a415f99cacdf3b147e11f47a40a0c362f"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1509.00921",
    "kind": "arxiv",
    "version": 1
  }
}