Pith Number

pith:TWKSGKB3

pith:2012:TWKSGKB3VHFQSCZJMHOW4TY76D

not attested not anchored not stored refs pending

Polynomial-time homology for simplicial Eilenberg-MacLane spaces

Francis Sergeraert, Jiri Matousek, Marek Krcal

arxiv:1201.6222 v3 · 2012-01-30 · cs.CG · 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{TWKSGKB3VHFQSCZJMHOW4TY76D}

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	2026-05-18T03:25:59.596145Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

9d9523283ba9cb090b2961dd6e4f1ff0cf03f70001193574fe51ac46a4d9ae20

Aliases

arxiv: 1201.6222 · arxiv_version: 1201.6222v3 · doi: 10.48550/arxiv.1201.6222 · pith_short_12: TWKSGKB3VHFQ · pith_short_16: TWKSGKB3VHFQSCZJ · pith_short_8: TWKSGKB3

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/TWKSGKB3VHFQSCZJMHOW4TY76D \
  | 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: 9d9523283ba9cb090b2961dd6e4f1ff0cf03f70001193574fe51ac46a4d9ae20

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "764c82a6d7b96707ffd5b3b1da795bb1b2286a061be389da1e2d72274512b9ad",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2012-01-30T14:24:37Z",
    "title_canon_sha256": "73592cd42ee6f2ba47da6c3558b580443be7677b730687c20465616d8ee56292"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1201.6222",
    "kind": "arxiv",
    "version": 3
  }
}