Pith Number

pith:JHBK5K2X

pith:2013:JHBK5K2XRCQ23CTHHZRMWVVDG6

not attested not anchored not stored refs pending

On topological complexity of Eilenberg-MacLane spaces

Yuli Rudyak

arxiv:1302.1238 v2 · 2013-02-06 · 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{JHBK5K2XRCQ23CTHHZRMWVVDG6}

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	2026-05-18T02:45:58.378383Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

49c2aeab5788a1ad8a673e62cb56a337a55d2fcffce548bb5b34845c5f174a15

Aliases

arxiv: 1302.1238 · arxiv_version: 1302.1238v2 · doi: 10.48550/arxiv.1302.1238 · pith_short_12: JHBK5K2XRCQ2 · pith_short_16: JHBK5K2XRCQ23CTH · pith_short_8: JHBK5K2X

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/JHBK5K2XRCQ23CTHHZRMWVVDG6 \
  | 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: 49c2aeab5788a1ad8a673e62cb56a337a55d2fcffce548bb5b34845c5f174a15

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "9ab45d76c92c70a64daf13cd9b1f53b43f23a3562fe24a659e043f9f4323829f",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2013-02-06T00:55:14Z",
    "title_canon_sha256": "d5c3e794d8c14f6856a969490c2420e5aea1eebf9a727e98dbe64c12503a5d1d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1302.1238",
    "kind": "arxiv",
    "version": 2
  }
}