Pith Number

pith:XXGL4YCD

pith:2014:XXGL4YCDOK4HHX5SPMDU5CE473

not attested not anchored not stored refs pending

Homotopy excision and cellularity

Jerome Scherer, Kay Werndli, Wojciech Chacholski

arxiv:1408.3252 v2 · 2014-08-14 · 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{XXGL4YCDOK4HHX5SPMDU5CE473}

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	2026-05-18T01:19:18.799044Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

bdccbe604372b873dfb27b074e889cfef60e454693d68fc66a1aa86d0ec1ab6d

Aliases

arxiv: 1408.3252 · arxiv_version: 1408.3252v2 · doi: 10.48550/arxiv.1408.3252 · pith_short_12: XXGL4YCDOK4H · pith_short_16: XXGL4YCDOK4HHX5S · pith_short_8: XXGL4YCD

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/XXGL4YCDOK4HHX5SPMDU5CE473 \
  | 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: bdccbe604372b873dfb27b074e889cfef60e454693d68fc66a1aa86d0ec1ab6d

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "e88b8e4e2078cf98195a33d8ea9df8458cc209b2406b2574d86bff20bcc83356",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-08-14T12:00:05Z",
    "title_canon_sha256": "7830bdd0c1c3662977f9b01d10359751268fca866a2cabe10bc6b8f343021bf8"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1408.3252",
    "kind": "arxiv",
    "version": 2
  }
}