Pith Number

pith:NG7JNEC2

pith:2019:NG7JNEC2RGZDDH6ZQBTJTMT5QG

not attested not anchored not stored refs pending

A note on covers defining relative and sectional categories

Jose Manuel Garc\'ia-Calcines

arxiv:1905.07199 v1 · 2019-05-17 · 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{NG7JNEC2RGZDDH6ZQBTJTMT5QG}

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	2026-05-17T23:45:56.189235Z
Builder	pith-number-builder-2026-05-17-v1
Signature	Pith Ed25519 (`pith-v1-2026-05`) · public key
Schema	pith-number/v1.0

Canonical hash

69be96905a89b2319fd9806699b27d81b3e93f1758757908dfb7b70bb0def9bf

Aliases

arxiv: 1905.07199 · arxiv_version: 1905.07199v1 · doi: 10.48550/arxiv.1905.07199 · pith_short_12: NG7JNEC2RGZD · pith_short_16: NG7JNEC2RGZDDH6Z · pith_short_8: NG7JNEC2

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/NG7JNEC2RGZDDH6ZQBTJTMT5QG \
  | 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: 69be96905a89b2319fd9806699b27d81b3e93f1758757908dfb7b70bb0def9bf

Canonical record JSON

{
  "metadata": {
    "abstract_canon_sha256": "c3308a98aea7020e37c98000d663c0cff7bf3cc9a0db8da919425fbdaf045937",
    "cross_cats_sorted": [],
    "license": "http://arxiv.org/licenses/nonexclusive-distrib/1.0/",
    "primary_cat": "math.AT",
    "submitted_at": "2019-05-17T11:15:00Z",
    "title_canon_sha256": "7374bbf47a5e388a04e536830fc722c44b2640bc842ed802fd7b55b420ed304d"
  },
  "schema_version": "1.0",
  "source": {
    "id": "1905.07199",
    "kind": "arxiv",
    "version": 1
  }
}