Pith Number

pith:QDHBWRFF

pith:2017:QDHBWRFFDENN3QUAZTT5YEUPC5

not attested not anchored not stored refs pending

Computing simplicial representatives of homotopy group elements

Marek Filakovsky, Peter Franek, Stephan Zhechev, Uli Wagner

arxiv:1706.00380 v2 · 2017-06-01 · 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{QDHBWRFFDENN3QUAZTT5YEUPC5}

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	2026-05-18T00:38:26.017391Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

80ce1b44a5191addc280cce7dc128f176df548999fc241c25b39c26f428201f7

Aliases

arxiv: 1706.00380 · arxiv_version: 1706.00380v2 · doi: 10.48550/arxiv.1706.00380 · pith_short_12: QDHBWRFFDENN · pith_short_16: QDHBWRFFDENN3QUA · pith_short_8: QDHBWRFF

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/QDHBWRFFDENN3QUAZTT5YEUPC5 \
  | 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: 80ce1b44a5191addc280cce7dc128f176df548999fc241c25b39c26f428201f7

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "92236161f6a7fef554674d5c0c0e6e090dbcde3a6b8629c002661057e234cc8e",
    "cross_cats_sorted": [
      "math.AT"
    ],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "cs.CG",
    "submitted_at": "2017-06-01T16:35:12Z",
    "title_canon_sha256": "66de897d763292ab98239f47f4c194f0198251990d6d6c45afaa5be683884919"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1706.00380",
    "kind": "arxiv",
    "version": 2
  }
}