Pith Number

pith:DYFWTZEI

pith:2014:DYFWTZEIP255Y5GEVRPYRGFIXO

not attested not anchored not stored refs pending

A few examples of $p$-good and $p$-bad classifying spaces

Nora Seeliger

arxiv:1411.7490 v5 · 2014-11-27 · 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{DYFWTZEIP255Y5GEVRPYRGFIXO}

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	2026-05-17T23:57:49.097920Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

1e0b69e4887ebbdc74c4ac5f8898a8bbb08b5c79a9724f36c23dc1859218cd4e

Aliases

arxiv: 1411.7490 · arxiv_version: 1411.7490v5 · doi: 10.48550/arxiv.1411.7490 · pith_short_12: DYFWTZEIP255 · pith_short_16: DYFWTZEIP255Y5GE · pith_short_8: DYFWTZEI

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/DYFWTZEIP255Y5GEVRPYRGFIXO \
  | 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: 1e0b69e4887ebbdc74c4ac5f8898a8bbb08b5c79a9724f36c23dc1859218cd4e

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "3bd0d0d34ea7bc8d4d97667d0b69d1f2b437050e8c3d6193ebd715de7f9083bd",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2014-11-27T07:45:54Z",
    "title_canon_sha256": "f8730a77a7849f36b39cd4470ec27624ea0e0938ede4c21b1178b00d3ef6085d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1411.7490",
    "kind": "arxiv",
    "version": 5
  }
}