Pith Number

pith:DO452C4R

pith:2011:DO452C4R6NCFPOPLCRPIQ2RMJC

not attested not anchored not stored refs pending

On the singular homology of one class of simply-connected cell-like spaces

Du\v{s}an Repov\v{s}, Katsuya Eda, Umed H. Karimov

arxiv:1105.2867 v2 · 2011-05-14 · math.GN · math.AT

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

Add to your LaTeX paper

\usepackage{pith}
\pithnumber{DO452C4R6NCFPOPLCRPIQ2RMJC}

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	2026-05-18T04:16:11.666351Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1bb9dd0b91f34457b9eb145e886a2c48b00d07214aeadffd9560f7dcdb88a3f8

Aliases

arxiv: 1105.2867 · arxiv_version: 1105.2867v2 · doi: 10.48550/arxiv.1105.2867 · pith_short_12: DO452C4R6NCF · pith_short_16: DO452C4R6NCFPOPL · pith_short_8: DO452C4R

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/DO452C4R6NCFPOPLCRPIQ2RMJC \
  | 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: 1bb9dd0b91f34457b9eb145e886a2c48b00d07214aeadffd9560f7dcdb88a3f8

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "a604bc528ce68827d79a1c3ab65bddaa5d1239ef55824fd0db80d63d89a3412c",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.GN",
    "submitted_at": "2011-05-14T06:20:17Z",
    "title_canon_sha256": "ed2e19facb2fcd2a95940a789ab0257feee2f9956e7d4aaaf6d7005f78dbe4be"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1105.2867",
    "kind": "arxiv",
    "version": 2
  }
}