Pith Number

pith:TSIZORY6

pith:2013:TSIZORY6WXIBJKOEFT5VS7GW76

not attested not anchored not stored refs pending

A core-free semicovering of the Hawaiian Earring

Andreas Zastrow, Hanspeter Fischer

arxiv:1301.3746 v2 · 2013-01-16 · 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{TSIZORY6WXIBJKOEFT5VS7GW76}

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	2026-05-18T03:14:50.022770Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9c9197471eb5d014a9c42cfb597cd6ff85551391313ddbc963a5cab8d3d1b9aa

Aliases

arxiv: 1301.3746 · arxiv_version: 1301.3746v2 · doi: 10.48550/arxiv.1301.3746 · pith_short_12: TSIZORY6WXIB · pith_short_16: TSIZORY6WXIBJKOE · pith_short_8: TSIZORY6

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/TSIZORY6WXIBJKOEFT5VS7GW76 \
  | 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: 9c9197471eb5d014a9c42cfb597cd6ff85551391313ddbc963a5cab8d3d1b9aa

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "f8ac8c4cc64af95ffe02343e127e532e4a90d855ae0067bc931d60e37f64afd5",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GT",
    "submitted_at": "2013-01-16T16:24:11Z",
    "title_canon_sha256": "e4fd3cc70f4f16e3ddef7479aff9c5954ab7bcf1f8eafa56571c242d62a43a09"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1301.3746",
    "kind": "arxiv",
    "version": 2
  }
}